Answer
56
Work Step by Step
$21\div\frac{3}{8}=21\times\frac{8}{3}=\frac{21\times8}{3}=\frac{168}{3}=\frac{168\div3}{3\div3}=\frac{56}{1}=56$
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 3 - Adding and Subtracting Fractions - Summary Exercises - Operations with Fractions - Page 235: 14
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