Exercise 18 Page 141

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= 150 and b= 63, and we are looking for the value of a.

a/b=p/100

SubstituteII

b= 63, p= 150

a/63=150/100

ReduceFrac

a/b=.a /50./.b /50.

a/63=3/2

MultEqn

LHS * 63=RHS* 63

a=3/2*63

MoveRightFacToNumOne

1/b* a = a/b

a=189/2

CalcQuot

Calculate quotient

a=94.5

This means that 94.5 is 150 % of 63.