SlideShare une entreprise Scribd logo
1  sur  41
Percentage Basics & Introduction
- By Kari Knisely
What you will learn…


 Where percents come from

 What percents are

 What percents look like

 Common percentages used in everyday life

 Why we use percents
Where Percents Come From

 Italian roots most commonly assumed
Where did percents come from?




Merriam-Webster – click here for more information


Encyclopedia/Merriam-Webster – click here for more information




Merriam-Webster Dictionary. Retrieved on March, 24 2012 from http://www.merriam-
webster.com/dictionary/percent
What Percents are & Basic Info

 Converts any quantity into a part of 100 to easily compare
What is a Percent?


     Per cent
      Per 100
        ÷ 100
   %= parts per 100
Percents as Fractions

Steps
2.Percentage number becomes numerator
3.Denominator becomes 100
4.Remove the percent sign
5.Simplify


             75        75        25     3
75 %
             100       100       25     4
            75 %         3
                         4
Percents as Decimals

Steps
2.Move decimal 2 places left
3.Remove the percent sign
4.Re-write decimal




75 %           75.0 %          75.0 %
                                      0.75
Is more than 100% possible?




             200%
Is more than 100% possible?




             175%

                              75%
What does a percent look like?



             %
What does a percent look like?
What does a percent look like?

   40 Test Questions = 100% = 1.0
What does a percent look like?
   40 Test Questions = 100% = 1.0




         50%        50%
         20 ?s      20 ?s
         0.50       0.50
What does a percent look like?
   40 Test Questions = 100% = 1.0


           25%     25%
           10 ?s   10 ?s
           0.25    0.25
           25%     25%
           10 ?s   10 ?s
           0.25    0.25
What does a percent look like?
   40 Test Questions = 100% = 1.0
             12.5% 12.5%
             5 ?s  5 ?s
       12.5% 0.125 0.125 12.5%
       5 ?s              5 ?s
       0.125             0.125
        12.5%             12.5%
        5 ?s              5 ?s
        0.125 12.5% 12.5% 0.125
              5 ?s  5 ?s
              0.125 0.125
Common Percentage Types

 Discounts & Sales

 Tips

 Taxes
Common Percentage Types
Common Percentage Types




                 Calculate
Common Percentage Types




                 Calculate
Common Percentage Types
Common Percentage Types




Calculate
Common Percentage Types




Calculate
Common Percentage Types
Common Percentage Types
                    Original     $24.99

                    Discount     - 7.50

                    Sale Price   $17.49

                    FL Tax Rate 6% = ?




Calculate
Common Percentage Types
                    Original     $24.99

                    Discount     - 7.50

                    Sale Price   $17.49

                    FL Tax Rate 6% = ?




Calculate
Why do we use percents?


 Compare different quantities
Why do we use percents?

Brad’s Math Test        Kim’s Science Test
45 questions correct    52 questions correct
IF 50 questions total   IF 60 questions total
Why do we use percents?
                                               45 ?s
                                                If 50 total ?s
0 ?s       12.5 ?s       25 ?s       37.5 ?s       50 ?s


0%         25%           50%            75%        100%
                                               ≈ 90%

             Brad’s Math Test
             45 questions correct
             IF 50 questions total
Why do we use percents?

             Kim’s Science Test
             52 questions correct
                 IF 60 questions total



                                                 52 ?s
                                                    If 60 total ?s
o ?s      15 ?s            30 ?s         45 ?s           60 ?s


0%         25%              50%          75%             100%
                                                 ≈ 87%
Why do we use percents?
                                          45 ?s
                                            If 50 total ?s
0 ?s        12.5 ?s   25 ?s   37.5 ?s           50 ?s


0%          25%       50%        75%            100%
                                          ≈ 90%

                                        52 ?s
                                           If 60 total ?s
 o ?s      15 ?s      30 ?s    45 ?s            60 ?s


 0%         25%        50%      75%             100%
                                        ≈ 87%
Why do we use percents?

Brad’s Math Test        Kim’s Science Test
45 questions correct    52 questions correct
IF 50 questions total   IF 60 questions total




 = 90%                      = 87%
Why do we use percents?

Brad’s Math Test        Kim’s Science Test
16 questions correct    16 questions correct
IF 20 questions total   IF 24 questions total
Why do we use percents?

                                              16 ?s   If 20 total ?s
0 ?s       5 ?s           10 ?s           15 ?s          20 ?s


0%         25%             50%            75%            100%

                                             ≈ 80%

                  Brad’s Math Test
                  16 questions correct
                  IF 20 questions total
Why do we use percents?
             Kim’s Science Test
             16 questions correct
                 IF 24 questions total




                                     16 ?s         If 24 total ?s
o ?s      6 ?s             12 ?s         18 ?s         24 ?s


0%         25%              50%              75%        100%
                                    ≈ 65%
Why do we use percents?

                                       16 ?s    If 20 total ?s
0 ?s        5 ?s   10 ?s           15 ?s           20 ?s


0%          25%     50%             75%             100%

                                      ≈ 80%


                            16 ?s              If 24 total ?s
 o ?s      6 ?s    12 ?s        18 ?s              24 ?s


 0%         25%     50%             75%             100%
                           ≈ 65%
Why do we use percents?

Brad’s Math Test        Kim’s Science Test
16 questions correct    16 questions correct
IF 20 questions total   IF 24 questions total




   ≈ 80%                        ≈ 65%
What you have learned…


 Where percents come from

 What percents are

 What percents look like

 Common percentages used in everyday life

 Why we use percents
Works Cited


 All images retrieved from Google images
Why do we use percents?

                                       16 ?s    If 20 total ?s
0 ?s        5 ?s   10 ?s           15 ?s           20 ?s


0%          25%     50%             75%             100%

                                      ≈ 80%


                            16 ?s              If 24 total ?s
 o ?s      6 ?s    12 ?s        18 ?s              24 ?s


 0%         25%     50%             75%             100%
                           ≈ 65%
Why do we use percents?
                                          45 ?s
                                            If 50 total ?s
0 ?s        12.5 ?s   25 ?s   37.5 ?s           50 ?s


0%          25%       50%        75%            100%
                                          ≈ 90%

                                        52 ?s
                                           If 60 total ?s
 o ?s      15 ?s      30 ?s    45 ?s            60 ?s


 0%         25%        50%      75%             100%
                                        ≈ 87%

Contenu connexe

En vedette (6)

Tutorial1
Tutorial1Tutorial1
Tutorial1
 
6332 lesson2quiz
6332 lesson2quiz6332 lesson2quiz
6332 lesson2quiz
 
6332 lesson4quiz
6332 lesson4quiz6332 lesson4quiz
6332 lesson4quiz
 
Steve jobspresentation
Steve jobspresentationSteve jobspresentation
Steve jobspresentation
 
6332 posttest
6332 posttest6332 posttest
6332 posttest
 
Boletos rifa
Boletos rifaBoletos rifa
Boletos rifa
 

Similaire à Tutorial1

Percentages_2.ppt
Percentages_2.pptPercentages_2.ppt
Percentages_2.pptanna786828
 
Revision grids-level-4
Revision grids-level-4Revision grids-level-4
Revision grids-level-4mkwoods77
 
Algebra 1. Percent.decimals review
Algebra 1. Percent.decimals reviewAlgebra 1. Percent.decimals review
Algebra 1. Percent.decimals reviewdmatkeson21
 
Algebra 1. Percent.decimals review. 9
Algebra 1. Percent.decimals review. 9Algebra 1. Percent.decimals review. 9
Algebra 1. Percent.decimals review. 9dmatkeson21
 
Solving percent equations
Solving percent equationsSolving percent equations
Solving percent equationsjoannahstevens
 
COT-1-2022-2023-presentation.pptx
COT-1-2022-2023-presentation.pptxCOT-1-2022-2023-presentation.pptx
COT-1-2022-2023-presentation.pptxPesinoGhie
 
1218852835 percentages
1218852835 percentages1218852835 percentages
1218852835 percentages雷丝 格
 
1218852835 percentages
1218852835 percentages1218852835 percentages
1218852835 percentages雷丝 格
 
Lesson 4 Finding the Percentage in a Given Problem
Lesson 4 Finding the Percentage in a Given ProblemLesson 4 Finding the Percentage in a Given Problem
Lesson 4 Finding the Percentage in a Given ProblemMadonna Acebuche
 
Percentages guidedollars
Percentages guidedollarsPercentages guidedollars
Percentages guidedollarsSmithnz
 
Internet Version Percent And Decimal
Internet  Version  Percent And  DecimalInternet  Version  Percent And  Decimal
Internet Version Percent And Decimalajhodgson
 
Aaron reedy jmih talk sunday 845 am symphony 1,2
Aaron reedy jmih talk sunday 845 am symphony 1,2Aaron reedy jmih talk sunday 845 am symphony 1,2
Aaron reedy jmih talk sunday 845 am symphony 1,2aaronmreedy
 
MATHS REVISION
MATHS REVISIONMATHS REVISION
MATHS REVISIONkk300
 

Similaire à Tutorial1 (18)

Percentages
PercentagesPercentages
Percentages
 
Percent Equations
Percent EquationsPercent Equations
Percent Equations
 
Percentages_2.ppt
Percentages_2.pptPercentages_2.ppt
Percentages_2.ppt
 
Percentages
PercentagesPercentages
Percentages
 
Revision grids-level-4
Revision grids-level-4Revision grids-level-4
Revision grids-level-4
 
Algebra 1. Percent.decimals review
Algebra 1. Percent.decimals reviewAlgebra 1. Percent.decimals review
Algebra 1. Percent.decimals review
 
Algebra 1. Percent.decimals review. 9
Algebra 1. Percent.decimals review. 9Algebra 1. Percent.decimals review. 9
Algebra 1. Percent.decimals review. 9
 
Solving percent equations
Solving percent equationsSolving percent equations
Solving percent equations
 
COT-1-2022-2023-presentation.pptx
COT-1-2022-2023-presentation.pptxCOT-1-2022-2023-presentation.pptx
COT-1-2022-2023-presentation.pptx
 
1218852835 percentages
1218852835 percentages1218852835 percentages
1218852835 percentages
 
1218852835 percentages
1218852835 percentages1218852835 percentages
1218852835 percentages
 
Lesson 4 Finding the Percentage in a Given Problem
Lesson 4 Finding the Percentage in a Given ProblemLesson 4 Finding the Percentage in a Given Problem
Lesson 4 Finding the Percentage in a Given Problem
 
Percentages guidedollars
Percentages guidedollarsPercentages guidedollars
Percentages guidedollars
 
Internet Version Percent And Decimal
Internet  Version  Percent And  DecimalInternet  Version  Percent And  Decimal
Internet Version Percent And Decimal
 
DI.pptx
DI.pptxDI.pptx
DI.pptx
 
Aaron reedy jmih talk sunday 845 am symphony 1,2
Aaron reedy jmih talk sunday 845 am symphony 1,2Aaron reedy jmih talk sunday 845 am symphony 1,2
Aaron reedy jmih talk sunday 845 am symphony 1,2
 
MATHS REVISION
MATHS REVISIONMATHS REVISION
MATHS REVISION
 
percent
percentpercent
percent
 

Plus de Kari Knisely, M.Ed. (20)

Kari Knisely Resume
Kari Knisely ResumeKari Knisely Resume
Kari Knisely Resume
 
Kari Knisely-ScrumAlliance_CSM_Certificate
Kari Knisely-ScrumAlliance_CSM_CertificateKari Knisely-ScrumAlliance_CSM_Certificate
Kari Knisely-ScrumAlliance_CSM_Certificate
 
Timeline
TimelineTimeline
Timeline
 
ATD Florida Suncoast Chapter New Member Orientation
ATD Florida Suncoast Chapter New Member OrientationATD Florida Suncoast Chapter New Member Orientation
ATD Florida Suncoast Chapter New Member Orientation
 
Website options
Website optionsWebsite options
Website options
 
Knisely ret poster_
Knisely ret poster_Knisely ret poster_
Knisely ret poster_
 
Knisely ret poster_
Knisely ret poster_Knisely ret poster_
Knisely ret poster_
 
Knisely ret poster_
Knisely ret poster_Knisely ret poster_
Knisely ret poster_
 
6332 posttest
6332 posttest6332 posttest
6332 posttest
 
6332 posttestproject
6332 posttestproject6332 posttestproject
6332 posttestproject
 
6332 pretest
6332 pretest6332 pretest
6332 pretest
 
6332 lesson3quiz
6332 lesson3quiz6332 lesson3quiz
6332 lesson3quiz
 
6332 lesson1quiz
6332 lesson1quiz6332 lesson1quiz
6332 lesson1quiz
 
Module3
Module3Module3
Module3
 
Module2
Module2Module2
Module2
 
Module2
Module2Module2
Module2
 
Module3
Module3Module3
Module3
 
Lab1ppsx
Lab1ppsxLab1ppsx
Lab1ppsx
 
Lab1 pptx
Lab1 pptxLab1 pptx
Lab1 pptx
 
Lab1 ppsx
Lab1 ppsxLab1 ppsx
Lab1 ppsx
 

Dernier

Keynote by Prof. Wurzer at Nordex about IP-design
Keynote by Prof. Wurzer at Nordex about IP-designKeynote by Prof. Wurzer at Nordex about IP-design
Keynote by Prof. Wurzer at Nordex about IP-designMIPLM
 
Dust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSEDust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSEaurabinda banchhor
 
Measures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped dataMeasures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped dataBabyAnnMotar
 
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATION
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATIONTHEORIES OF ORGANIZATION-PUBLIC ADMINISTRATION
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATIONHumphrey A Beña
 
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfInclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfTechSoup
 
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...Nguyen Thanh Tu Collection
 
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptx
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptxINTRODUCTION TO CATHOLIC CHRISTOLOGY.pptx
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptxHumphrey A Beña
 
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTSGRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTSJoshuaGantuangco2
 
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...Postal Advocate Inc.
 
ClimART Action | eTwinning Project
ClimART Action    |    eTwinning ProjectClimART Action    |    eTwinning Project
ClimART Action | eTwinning Projectjordimapav
 
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPHow to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPCeline George
 
Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)Mark Reed
 
Presentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxPresentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxRosabel UA
 
Transaction Management in Database Management System
Transaction Management in Database Management SystemTransaction Management in Database Management System
Transaction Management in Database Management SystemChristalin Nelson
 
Expanded definition: technical and operational
Expanded definition: technical and operationalExpanded definition: technical and operational
Expanded definition: technical and operationalssuser3e220a
 
Oppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmOppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmStan Meyer
 
Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...Seán Kennedy
 
Textual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSTextual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSMae Pangan
 
ROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxVanesaIglesias10
 

Dernier (20)

Keynote by Prof. Wurzer at Nordex about IP-design
Keynote by Prof. Wurzer at Nordex about IP-designKeynote by Prof. Wurzer at Nordex about IP-design
Keynote by Prof. Wurzer at Nordex about IP-design
 
Dust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSEDust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSE
 
Measures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped dataMeasures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped data
 
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATION
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATIONTHEORIES OF ORGANIZATION-PUBLIC ADMINISTRATION
THEORIES OF ORGANIZATION-PUBLIC ADMINISTRATION
 
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdfInclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
Inclusivity Essentials_ Creating Accessible Websites for Nonprofits .pdf
 
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
 
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptx
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptxINTRODUCTION TO CATHOLIC CHRISTOLOGY.pptx
INTRODUCTION TO CATHOLIC CHRISTOLOGY.pptx
 
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTSGRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
 
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
USPS® Forced Meter Migration - How to Know if Your Postage Meter Will Soon be...
 
ClimART Action | eTwinning Project
ClimART Action    |    eTwinning ProjectClimART Action    |    eTwinning Project
ClimART Action | eTwinning Project
 
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERPHow to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
 
Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)
 
Presentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptxPresentation Activity 2. Unit 3 transv.pptx
Presentation Activity 2. Unit 3 transv.pptx
 
Transaction Management in Database Management System
Transaction Management in Database Management SystemTransaction Management in Database Management System
Transaction Management in Database Management System
 
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptxLEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
 
Expanded definition: technical and operational
Expanded definition: technical and operationalExpanded definition: technical and operational
Expanded definition: technical and operational
 
Oppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and FilmOppenheimer Film Discussion for Philosophy and Film
Oppenheimer Film Discussion for Philosophy and Film
 
Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...
 
Textual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHSTextual Evidence in Reading and Writing of SHS
Textual Evidence in Reading and Writing of SHS
 
ROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptxROLES IN A STAGE PRODUCTION in arts.pptx
ROLES IN A STAGE PRODUCTION in arts.pptx
 

Tutorial1

  • 1. Percentage Basics & Introduction - By Kari Knisely
  • 2. What you will learn…  Where percents come from  What percents are  What percents look like  Common percentages used in everyday life  Why we use percents
  • 3. Where Percents Come From  Italian roots most commonly assumed
  • 4. Where did percents come from? Merriam-Webster – click here for more information Encyclopedia/Merriam-Webster – click here for more information Merriam-Webster Dictionary. Retrieved on March, 24 2012 from http://www.merriam- webster.com/dictionary/percent
  • 5. What Percents are & Basic Info  Converts any quantity into a part of 100 to easily compare
  • 6. What is a Percent? Per cent Per 100 ÷ 100 %= parts per 100
  • 7. Percents as Fractions Steps 2.Percentage number becomes numerator 3.Denominator becomes 100 4.Remove the percent sign 5.Simplify 75 75 25 3 75 % 100 100 25 4 75 % 3 4
  • 8. Percents as Decimals Steps 2.Move decimal 2 places left 3.Remove the percent sign 4.Re-write decimal 75 % 75.0 % 75.0 %   0.75
  • 9. Is more than 100% possible? 200%
  • 10. Is more than 100% possible? 175% 75%
  • 11. What does a percent look like? %
  • 12. What does a percent look like?
  • 13. What does a percent look like? 40 Test Questions = 100% = 1.0
  • 14. What does a percent look like? 40 Test Questions = 100% = 1.0 50% 50% 20 ?s 20 ?s 0.50 0.50
  • 15. What does a percent look like? 40 Test Questions = 100% = 1.0 25% 25% 10 ?s 10 ?s 0.25 0.25 25% 25% 10 ?s 10 ?s 0.25 0.25
  • 16. What does a percent look like? 40 Test Questions = 100% = 1.0 12.5% 12.5% 5 ?s 5 ?s 12.5% 0.125 0.125 12.5% 5 ?s 5 ?s 0.125 0.125 12.5% 12.5% 5 ?s 5 ?s 0.125 12.5% 12.5% 0.125 5 ?s 5 ?s 0.125 0.125
  • 17. Common Percentage Types  Discounts & Sales  Tips  Taxes
  • 25. Common Percentage Types Original $24.99 Discount - 7.50 Sale Price $17.49 FL Tax Rate 6% = ? Calculate
  • 26. Common Percentage Types Original $24.99 Discount - 7.50 Sale Price $17.49 FL Tax Rate 6% = ? Calculate
  • 27. Why do we use percents?  Compare different quantities
  • 28. Why do we use percents? Brad’s Math Test Kim’s Science Test 45 questions correct 52 questions correct IF 50 questions total IF 60 questions total
  • 29. Why do we use percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% Brad’s Math Test 45 questions correct IF 50 questions total
  • 30. Why do we use percents? Kim’s Science Test 52 questions correct IF 60 questions total 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%
  • 31. Why do we use percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%
  • 32. Why do we use percents? Brad’s Math Test Kim’s Science Test 45 questions correct 52 questions correct IF 50 questions total IF 60 questions total = 90% = 87%
  • 33. Why do we use percents? Brad’s Math Test Kim’s Science Test 16 questions correct 16 questions correct IF 20 questions total IF 24 questions total
  • 34. Why do we use percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% Brad’s Math Test 16 questions correct IF 20 questions total
  • 35. Why do we use percents? Kim’s Science Test 16 questions correct IF 24 questions total 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
  • 36. Why do we use percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
  • 37. Why do we use percents? Brad’s Math Test Kim’s Science Test 16 questions correct 16 questions correct IF 20 questions total IF 24 questions total ≈ 80% ≈ 65%
  • 38. What you have learned…  Where percents come from  What percents are  What percents look like  Common percentages used in everyday life  Why we use percents
  • 39. Works Cited  All images retrieved from Google images
  • 40. Why do we use percents? 16 ?s If 20 total ?s 0 ?s 5 ?s 10 ?s 15 ?s 20 ?s 0% 25% 50% 75% 100% ≈ 80% 16 ?s If 24 total ?s o ?s 6 ?s 12 ?s 18 ?s 24 ?s 0% 25% 50% 75% 100% ≈ 65%
  • 41. Why do we use percents? 45 ?s If 50 total ?s 0 ?s 12.5 ?s 25 ?s 37.5 ?s 50 ?s 0% 25% 50% 75% 100% ≈ 90% 52 ?s If 60 total ?s o ?s 15 ?s 30 ?s 45 ?s 60 ?s 0% 25% 50% 75% 100% ≈ 87%

Notes de l'éditeur

  1. Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
  2. Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
  3. Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.
  4. Can we assume Kim did better than Brad because she got more questions right even though there were different amounts of questions on the tests? ? 100 is an easy number to work with. If we compare the two test scores out of parts per 100 then we can compare them evenly.