Percents And Probability Worksheet With Answers - Lesson 12-19 Page 31
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49What number is 32% of 75?
examPle 1
part
percent
whole
s
Use the percent equation.
x = 32% ∙ 75
olution
x = 0.32 ∙ 75
Convert the percent to a decimal.
Simplify.
x = 24
24 is 32% of 75.
examPle 2
What percent of 60 is 90?
s
Use the percent equation.
90 = x ∙ 60
olution
= x ∙ 60
90 __
____
Divide by 60.
60
60
1.5 = x
Convert 1.5 to a percent.
1.5 ∙ 100 = 150%
150% of 60 is 90.
Th irty-six is 25% of what number?
examPle 3
s
36 = 25% ∙ x
Use the percent equation.
olution
Convert the percent to a decimal.
36 = 0.25x
36
= 0.25x
___
____
Divide by 0.25.
0.25
0.25
144 = x
Th irty-six is 25% of 144 .
Jaycee spent about 30% of a 24-hour day at school.
examPle 4
how much time does she spend at school each day?
s
olution
Use the percent equation.
x = 0.3 ∙ 24
x = 7.2
Simplify.
Jaycee spends about 7.2 hours at school.
= x __
2 __
→ 10x = 120 → x = 12
7.2 hours is 7 hours and 0.2 hours.
10
60
Write 0.2 hours as a ratio and use a
proportion to solve for the number
of minutes out of 60 minutes in an hour.
Jaycee spends about 7 hours and 12 minutes at school each day.
101
Lesson 17 ~ Solving Percents Using Equations
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