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: 33

Answer

$ \frac{3}{40}$.

Work Step by Step

$\frac{7}{8} - \frac{4}{5} = \frac{7 \cdot 5}{8 \cdot 5} - \frac{4 \cdot 8}{5 \cdot 8} = \frac{35}{40} - \frac{32}{40} = \frac{35 - 32}{40} = \frac{3}{40}$.
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