## Algebra 1: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 509: 66

#### Answer

$25\%,\qquad$increase.

#### Work Step by Step

Percent change = $\displaystyle \frac{\text{new value-initial value}}{\text{initial value}}\cdot 100\%$ If the percent change is $positive$, we have an increase. If the percent change is $negative,$ we have a decrease. Percent change = $\displaystyle \frac{5-4}{4}\cdot 100\%=+25\%,\qquad$increase.

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