Answer
Whole is 70.
Work Step by Step
$\frac{28}{x} = \frac{40}{100}$
$40x = 28\times100$
$\frac{40x}{40} = \frac{2800}{40}$
$x = 70$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 6 - Percent - 6.3 Using the Percent Proportion and Identifying the Components in a Percent Problem - 6.3 Exercises - Page 406: 9
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