Fractions, Decimals & %

Lesson #26 & #27

Fraction to Decimal

A fraction is like a division 1 fifth is the same as 1 ÷ 5

1 = 0.25

Divide the numerator by the denominator

Fraction to PercentA percentage is a fraction with 100 as the denominator

Ex Write 2 as a percentage 5

2 x 20 = 40 40 %5 x 20 100

“Trick” to find %

Numerator ÷ denominator x 100

3 3 ÷ 7 x 100 7

42.9 %

Percent to Decimal

Divide by 100

15% 15/100 = 15 ÷ 100 = 0.15

Percent to a Fraction

Place over 100Reduce

Example:20%= 20/100Reduce : 2/10 or 1/5

Decimal to Fractions

Write the number how you would read it out loud:

0.05 = Five hundredths = 5/100 then reduce 1/20

Decimal to %

Multiply by 100

Example:0.25 = 0.25 x 100 = 25%1.1 = 1.1 x 100 = 0.005 =0.54 =

HOMEWORK

p. 91 #1-4P. 92 #6P. 93 #9P. 95 #4P. 99 #3P. 100 #4-8P. 101 #9

Extra Practice: Stencils on fractions, decimals and percent