Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 6 - Percent - 6.4 Using Proportions to Solve Percent Problems - 6.4 Exercises: 23



Work Step by Step

Set up a percent proportion. X is the unknown. $\frac{part}{whole}=\frac{percent}{100}$ $\frac{48}{x}=\frac{30}{100}$ Find cross products $3x=480$ Divide both sides by 3: $\frac{3x}{3}=\frac{480}{3}$ $x=160$
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