Prealgebra (7th Edition)

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

Chapter 8 - Section 8.5 - Counting and Introduction to Probability - Exercise Set: 36



Work Step by Step

The least common denominator is 10. Convert to like fractions and subtract. $\frac{7}{10}-\frac{2}{5}$ =$\frac{7}{10}-\frac{2\times2}{5\times2}$ =$\frac{7}{10}-\frac{4}{10}$ =$\frac{3}{10}$
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