Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 3 - Adding and Subtracting Fractions - 3.3 Adding and Subtracting Unlike Fractions - 3.3 Exercises - Page 222: 51

Answer

The diameter is $\frac{3}{16}$ inches.

Work Step by Step

$\frac{15}{16} - \frac{3}{8} - \frac{3}{8}$ Visual inspection shows the LCM is 16. Express as like fractions and subtract. $\frac{15}{16} - \frac{3}{8} - \frac{3}{8}$ = $\frac{15}{16} - \frac{6}{16} - \frac{6}{16}$ = $\frac{3}{16}$
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