Exercise 11 Page 249

The percent equation is an equation in which the part is equal to the product of the corresponding percent and the whole. We can represent a is p percent of wwith the following equation. a= p% * wWe can find what percent of 72 is equal to 108 by substituting a= 108 and w= 72 into the formula and solve for p% using the Properties of Equality.

a= p% * w

SubstituteII

a= 108, w= 72

108= p% * 72

▼

Solve for p%

DivEqn

.LHS /72.=.RHS /72.

108/72=p% * 72/72

CancelCommonFac

Cancel out common factors

108/72=p% * 72/72

SimpQuot

Simplify quotient

108/72=p%

CalcQuot

Calculate quotient

1.5=p%

RearrangeEqn

Rearrange equation

p%= 1.5

Since 1.5 equals 150%, we can complete percent equation. 108= 150% * 72 We found that 108 is 150 % of 72.