Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 7 - Section 7.3 - Solving Percent Problems with Proportions - Exercise Set: 43

Answer

140

Work Step by Step

Use cross multiplication. $\frac{2.5}{100}=\frac{3.5}{x}$ $2.5x=3.5\times100$ $2.5x\div2.5=350\div2.5$ $x=140$
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