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: 41

Answer

0.5%

Work Step by Step

Use cross multiplication. $\frac{x}{100}=\frac{4}{800}$ $800x=4\times100$ $800x\div800=400\div800$ $x=0.5$
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