Basic College Mathematics (9th Edition)

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

Chapter 3 - Adding and Subtracting Fractions - 3.1 Adding and Subtracting Like Fractions - 3.1 Execises: 25

Answer

$\frac{8}{7}$

Work Step by Step

$\frac{31}{21}-\frac{7}{21}=\frac{31-7}{21}=\frac{24}{21}=\frac{24\div3}{21\div3}=\frac{8}{7}$
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