## Elementary Algebra

Published by Cengage Learning

# Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.2 - Percents and Problem Solving - Problem Set 4.2 - Page 156: 52

#### Answer

The percent change in the price of a bleacher seat is 150%. It is a percent increase.

#### Work Step by Step

To find the percent change, we use the following formula: percent change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100% The original price was 8.00 dollars. The new price became 20.00 dollars. Substituting these values into the formula yields percent change = $\frac{20.00\ -\ 8.00}{8.00}$ $\times$ 100% percent change = $\frac{12.00}{8.00}$ $\times$ 100% percent change = 1.5 $\times$ 100% percent change = 150% Because the percent change is a positive number, it is a percent increase.

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