1. Fractions, Decimals, and Percents

2. Skittles Activity
 Take the Skittles out of the bag and sort them by color
 Multiply the amount of Skittles you have per color by 100
 Record data on activity sheets
 Calculate total amount of Skittles
 Calculate and record the fractions for each color of Skittles
 Convert fractions into percents and record on activity sheet
 Convert percents into decimals and then record on activity sheet
 Create a pie chart representing the amount of each Skittle color

3. Skittles Activity Sheet
Colors: Green Purple Yellow Red Orange
Amount: 7 6 3 9 5
Amount * 100 700 600 300 900 500
Fraction 7/30 6/30 3/30 9/30 5/30
1/5 1/10 3/10 1/6
Fraction *100 700/3000= 600/3000= 300/3000= 900/3000= 500/3000=
7/30 1/5 1/10 3/10 1/6
Percent 23% 20% 10% 30% 17%
Decimal 0.23 0.2 0.1 0.3 0.17

4. Skittles Pie Chart
17%
23%
Green
Purple
Yellow
Red
30% 20% Orange
10%

5. From Percent to Decimal
 To convert from percent to decimal:
 Divide by 100
 Remove the "%" sign
 The easiest way to divide by 100 is to move the decimal point 2 places
to the left.
From Percent To Decimal

6. From Decimal to Percent
 To convert from decimal to percent
 Multiply by 100
 Add a "%" sign
 The easiest way to multiply by 100 is to move the decimal point 2
places to the right
From Decimal To Percent

7. From Fraction to Decimal
 The easiest way to convert a fraction to a decimal is to
 Divide the top number by the bottom number
 In mathematical language: Divide the numerator by the denominator
 Example:
 Convert 2/5 to a decimal
 Divide 2 by 5:
 2 ÷ 5 = 0.4
 Answer: 2/5 = 0.4

8. From Decimal to Fraction
 To convert a decimal to a fraction needs a little more work.
 Example: To convert 0.75 to a fraction
Steps: Example:
First, write down the decimal "over" the 0.75 /1
number 1
Then multiply top and bottom by 10 for 0.75 × 100 / 1 × 100
every number after the decimal point (10
for 1 number, 100 for 2 numbers, etc)
(This makes it a correctly formed fraction) = 75 / 100
Then simplify the fraction 3 /4

9. From Fraction to Percentage
 The easiest way to convert a fraction to a percentage is to
 Divide the top number by the bottom number
 Multiply the result by 100
 Add the "%" sign
 Example: Convert 3/8 to a percentage
 First divide 3 by 8:
 3 ÷ 8 = 0.375,
 Then multiply by 100:
 0.375 x 100 = 37.5
 Add the "%" sign:
 37.5%
 Answer: 3/8 = 37.5%

10. From Percentage to Fraction
 To convert a percentage to a fraction:
 First convert to a decimal (divide by 100)
 Then use the steps for converting decimal to fractions.
 Example: To convert 80% to a fraction
Steps: Example:
Convert 80% to a decimal (80/100): 0.8
Write down the decimal "over" the 0.8 /1
number 1)
Then multiply top and bottom by 10 for
every number after the decimal point (10 0.8 × 10 / 1 × 10
for 1 number, 100 for 2 numbers, etc)
(This makes it a correctly formed fraction) = 8 / 10
Then Simplify the fraction 4 /5

11. I Have….Who Has….
 We will now play a game that involves everyone paying careful
attention to one another!
 The student who receives the index card with 50% will start the
game
 This student will stand up and read the card:
 I have 50%. Who has the equivalent fraction?
 Then the students who has the card with ½ stands up and reads
their card.
 Each student will read their card loud and clear
 The student who has the answer to the question that is
read will stand up and read their card