Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 2 - Cumulative Review Exercises - Page 207: 14


48 is 30% of 160. The unknown number is 160.

Work Step by Step

Let's translate these words into mathematical language. We are trying to look for the unknown number, $x$. 48 = 30%$\times x$ We change 30% into a decimal by changing the % symbol into a decimal and moving that decimal two places to the left. We then get: 48 = 0.30$\times x$ Now we can solve for $x$. We divide each side by 0.30, and we get: $x = 160$
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