Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 3 - Adding and Subtracting Fractions - Test - Page 259: 15

Answer

Estimate: 24 - 18 = 6 Exact: $5\frac{5}{8}$

Work Step by Step

$24-18\frac{3}{8}$ Lets first Find Estimate of fraction: $18\frac{3}{8}$=18 $24-18\frac{3}{8}$ = 24 - 18 = 6 Now find Exact: $24-18\frac{3}{8}$ = $24-\frac{18\times8+3}{8}$ = $24-\frac{147}{8}$ = $\frac{24\times8}{1\times8}-\frac{147}{8}$ (Least common multiple of 1 & 8 is 8) = $\frac{196}{8}-\frac{147}{8}$ = $\frac{192-147}{8}$ (Subtraction of fraction with same denominator) = $\frac{45}{8}$ = $5\frac{5}{8}$
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