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Pearson Algebra 1 Common Core, 2011 View details

Chapter Review

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Exercise 53 Page 156

The percent proportion is a proportion that equates a part of a whole to a percent out of 100.

108

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 value b= 150 and the percent p= 72. Therefore, we are looking for the value a.

a/b=p/100

SubstituteII

b= 150, p= 72

a/150=72/100

ReduceFrac

a/b=.a /4./.b /4.

a/150=18/25

MultEqn

LHS * 150=RHS* 150

a=18/25 * 150

MoveRightFacToNum

a/c* b = a* b/c