Percents And Probability Worksheet With Answers - Lesson 12-19 Page 3
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49FractiOns, decimals and Percents
Lesson 12
A
percent
is a ratio comparing a number to 100. A percent can be written as a fraction or a decimal.
Aft er talking to 100 randomly selected people, Denise found that 21 of them preferred
21
chocolate ice cream. Th e fraction
___
represents 21 out of 100 people. Th e decimal 0.21
100
also represents 21 out of 100 people. Additionally, 21 out of 100 people can be written
as a percent as 21%.
21
___
21% =
= 0.21
100
Articles in newspapers, magazines or on web sites use fractions, decimals and percents
when citing research and data. It is important to be able to read fractions, decimals
and percents. It is also important to be able to write each one in any of the three forms.
Write each percent as a fraction and a decimal.
examPle 1
a.
5%
2
b.
8%
8
25
___
a. Write the percent as a fraction with
25% =
s
olutions
100
100 in the denominator.
25
= 1 _
___
Simplify the fraction.
100
4
Convert to a decimal by fi nding the
1 ÷ 4 = 0.25
value of 1 ÷ 4.
1 _
25% =
= 0.25
4
88
___
b. Write the percent as a fraction with
88% =
100
100 in the denominator.
88
= 22 __
___
Simplify the fraction.
100
25
Convert to a decimal by fi nding the
22 ÷ 25 = 0.88
value of 22 ÷ 25.
22 __
88% =
= 0.88
25
73
Lesson 12 ~ Fractions, Decimals And Percents
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