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Unit 2
Percentages
Presentation 1 Conversion
Presentation 2 Conversion: Revision
Presentation 3 Percentages of Quantities
Presentation 4 Quantities as Percentages
Presentation 5 Percentage Increases and Decreases
Unit 2
Percentages
Conversion
What is as i) decimal and ii) fraction?
i)
ii)
as a fraction
in its simplest form
What is as a percentage?
Express as a fraction with 100 as the
denominator
What is as a percentage?
Write as a fraction with 100 as the
denominator
You have finished viewing the presentation
Conversion
Please choose an option
Return to the Start
Presentation 2 Conversion: Revision
Presentation 3 Percentages of Quantities
Presentation 4 Quantities as Percentages
Presentation 5 Percentage Increases and Decreases
Unit 2
Percentages
Conversion: Revision
Fractions Decimals Percentages
You have finished viewing the presentation
Conversion: Revision
Please choose an option
Return to the Start
Presentation 1 Conversion
Presentation 3 Percentages of Quantities
Presentation 4 Quantities as Percentages
Presentation 5 Percentage Increases and Decreases
Unit 2
Percentages
Percentages of Quantities
Find of J$76
First convert the percentage into either a
fraction or decimal
Decimal method
Find of J$76
First convert the percentage into either a
fraction or decimal
Fraction method
You have finished viewing the presentation
Percentages as Quantities
Please choose an option
Return to the Start
Presentation 1 Conversion
Presentation 2 Conversion: Revision
Presentation 4 Quantities as Percentages
Presentation 5 Percentage Increases and Decreases
Unit 2
Percentages
Quantities as Percentages
In a class of 25 students, there are 10 girls.
What percentage of the class are girls?
The fraction of girls is:
As a percentage, this is:
A book contained 80 black and white
pictures and 120 colour pictures. What
percentage of the pictures were in colour?
The fraction of colour pictures:
As a percentage this is:
A bank pays interest of % per annum.
How much interest do you get in one year if
you invest J$50?
Interest
You have finished viewing the presentation
Quantities as Percentages
Please choose an option
Return to the Start
Presentation 1 Conversion
Presentation 2 Conversion: Revision
Presentation 3 Percentages of Quantities
Presentation 5 Percentage Increases and Decreases
Unit 2
Percentages
Percentage Increases and
Decreases
Percentage increase
Example: The population of a village
increased from 234 to 275 in one year.
What was the percentage increase?
Actual increase
Percentage increase
(to 2 decimal places)
Percentage decrease
Example: A cup of sand is dried in a hot
oven. Its mass reduces from 450 grams to
320 grams. What is the percentage
decrease of its mass?
Actual reduction
Percentage reduction
(to 1 decimal places)
You have finished viewing the presentation
Percentage Increases and Decreases
Please choose an option
Return to the Start
Presentation 1 Conversion
Presentation 2 Conversion: Revision
Presentation 3 Percentages of Quantities
Presentation 4 Quantities as Percentages

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Math unit2 percentages

  • 1. Unit 2 Percentages Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases
  • 3. What is as i) decimal and ii) fraction? i) ii) as a fraction in its simplest form
  • 4. What is as a percentage? Express as a fraction with 100 as the denominator
  • 5. What is as a percentage? Write as a fraction with 100 as the denominator
  • 6. You have finished viewing the presentation Conversion Please choose an option Return to the Start Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases
  • 9. You have finished viewing the presentation Conversion: Revision Please choose an option Return to the Start Presentation 1 Conversion Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases
  • 11. Find of J$76 First convert the percentage into either a fraction or decimal Decimal method
  • 12. Find of J$76 First convert the percentage into either a fraction or decimal Fraction method
  • 13. You have finished viewing the presentation Percentages as Quantities Please choose an option Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 4 Quantities as Percentages Presentation 5 Percentage Increases and Decreases
  • 15. In a class of 25 students, there are 10 girls. What percentage of the class are girls? The fraction of girls is: As a percentage, this is:
  • 16. A book contained 80 black and white pictures and 120 colour pictures. What percentage of the pictures were in colour? The fraction of colour pictures: As a percentage this is:
  • 17. A bank pays interest of % per annum. How much interest do you get in one year if you invest J$50? Interest
  • 18. You have finished viewing the presentation Quantities as Percentages Please choose an option Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 5 Percentage Increases and Decreases
  • 20. Percentage increase Example: The population of a village increased from 234 to 275 in one year. What was the percentage increase? Actual increase Percentage increase (to 2 decimal places)
  • 21. Percentage decrease Example: A cup of sand is dried in a hot oven. Its mass reduces from 450 grams to 320 grams. What is the percentage decrease of its mass? Actual reduction Percentage reduction (to 1 decimal places)
  • 22. You have finished viewing the presentation Percentage Increases and Decreases Please choose an option Return to the Start Presentation 1 Conversion Presentation 2 Conversion: Revision Presentation 3 Percentages of Quantities Presentation 4 Quantities as Percentages