Exercise 28 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= 1 and a= 1, and we are looking for the value of b.

a/b=p/100

SubstituteII

a= 1, p= 1

1/b=1/100

MultEqn

LHS * b=RHS* b

1=1/100* b

MoveRightFacToNumOne

1/b* a = a/b

1=b/100

MultEqn

LHS * 100=RHS* 100

100=b

RearrangeEqn

Rearrange equation

b=100

This means that 1 is 1 % of 100.