Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.2 - Percents and Problem Solving - Problem Set 4.2: 28


The number we are looking for is 500.

Work Step by Step

Let X represent the number we are looking for. 2.1% of what number means 2.1% $\times$ X Is 10.5 means =10.5 So, this question translates to: 2.1% $\times$ X = 10.5 0.021 $\times$ X = 10.5 Divide both sides by 0.021 X = 500
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