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: 57


Monthly earnings are 3200. Yearly earnings are 38,400.

Work Step by Step

The percent is 7.5%. The part is 240. The whole is unknown. $\frac{240}{x} = \frac{7.5}{100}$ $7.5x = 240\times100$ $\frac{7.5x}{7.5} = \frac{24000}{7.5}$ $x = 3200$ $3200\times12 = 38,400.
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