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Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
9. Percents
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Exercise 19 Page 141

Use the percent proportion.

16

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= 125 and b= 12.8, and we are looking for the value of a.

a/b=p/100
SubstituteII

b= 12.8, p= 125

a/12.8=125/100
ReduceFrac

a/b=.a /25./.b /25.

a/12.8=5/4
MultEqn

LHS * 12.8=RHS* 12.8

a=5/4 * (12.8)
MoveRightFacToNumOne

1/b* a = a/b

a=64/4
CalcQuot

Calculate quotient

a=16

This means that 16 is 125 % of 12.8.

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arrow_right Lesson Check p.141
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Lesson Check 2 (Page 141)
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Practice and Problem-Solving Exercises 9 (Page 141)
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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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