Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 4 - Section 4.5 - Adding and Subtracting Unlike Fractions - Exercise Set: 40

Answer

$-\frac{11}{60}$

Work Step by Step

LCD is 60. $-\frac{1}{3}-\frac{1}{4}+\frac{2}{5}=-\frac{1\times20}{3\times20}-\frac{1\times15}{4\times15}+\frac{2\times12}{5\times12}=-\frac{20}{60}-\frac{15}{60}+\frac{24}{60}=\frac{-20-15+24}{60}=\frac{-11}{60}$
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