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 - Practice: 4

Answer

$-\frac{13}{70}$

Work Step by Step

$\frac{5}{7}-\frac{9}{10}$ $=-\frac{9}{10}+\frac{5}{7}$ $=-(\frac{9}{10}-\frac{5}{7})$ $=-(\frac{9\times7}{10\times7}-\frac{5\times10}{7\times10})$ $=-(\frac{63}{70}-\frac{50}{70})$ $=-\frac{13}{70}$
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