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Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
9. Percents
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Exercise 25 Page 141

Use the percent proportion.

22.5

Practice makes perfect
In the percent proportion, the ratio of the part a to the whole b is equal to the percent p written as a fraction. a/b=p/100 Given any two of these three variables, we can find the third one. In this exercise, we are given the values p= 60 and a= 13.5, and we are looking for the value of b.
a/b=p/100
SubstituteII

a= 13.5, p= 60

13.5/b=60/100
ReduceFrac

a/b=.a /20./.b /20.

13.5/b=3/5
MultEqn

LHS * b=RHS* b

13.5=3/5* b
MoveRightFacToNumOne

1/b* a = a/b

13.5=3b/5
MultEqn

LHS * 5=RHS* 5

67.5=3b
DivEqn

.LHS /3.=.RHS /3.

22.5=b
RearrangeEqn

Rearrange equation

b=22.5
This means that 13.5 is 60 % of 22.5.
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arrow_right Lesson Check p.141
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Lesson Check 2 (Page 141)
Lesson Check 3 (Page 141)
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arrow_right Practice and Problem-Solving Exercises p.141-143
Practice and Problem-Solving Exercises 9 (Page 141)
Practice and Problem-Solving Exercises 10 (Page 141)
Practice and Problem-Solving Exercises 11 (Page 141)
Practice and Problem-Solving Exercises 12 (Page 141)
Practice and Problem-Solving Exercises 13 (Page 141)
Practice and Problem-Solving Exercises 14 (Page 141)
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Practice and Problem-Solving Exercises 25 (Page 141)
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Practice and Problem-Solving Exercises 31 (Page 142)
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Practice and Problem-Solving Exercises 40 (Page 142)
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Practice and Problem-Solving Exercises 45 (Page 142)
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arrow_right Standardized Test Prep p.143
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arrow_right Mixed Review p.143
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Mixed Review 59 (Page 143)
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Mixed Review 62 (Page 143)