Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 3 - Adding and Subtracting Fractions - 3.3 Adding and Subtracting Unlike Fractions - 3.3 Exercises - Page 219: 21



Work Step by Step

We can perform vertical addition using the same techniques as horizontal addition. The LCM of the original denominators, 12 and 16, is 48. Therefore, we can rewrite the original fractions with a denominator of 48. $\frac{5}{12}+\frac{1}{16}=\frac{5\times4}{12\times4}+\frac{1\times3}{16\times3}=\frac{20}{48}+\frac{3}{48}=\frac{20+3}{48}=\frac{23}{48}$
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