Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.2 - Percents and Problem Solving - Problem Set 4.2 - Page 155: 24

30

We will use the variable, n, to denote the number that we want to find. We know that the percent (written as a decimal) multiplied by n must be equal to 66. Thus, we set up the following equation: 2.2n=66. We divide both sides of the equation by 2.2 to obtain that n=30.