Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 509: 68


$12.5\%,\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 = $\displaystyle \frac{35-40}{40}\cdot 100\%$ $= \displaystyle \frac{5}{40}\cdot 100\%$ $= \displaystyle \frac{1}{8}\cdot 100\%$ $=+12.5\%,\qquad $increase.
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