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
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