Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 1 - Foundations for Algebra - Get Ready!: 23

Answer

$\frac{1}{10}$

Work Step by Step

We need a common denominator (bottom of the fraction) to subtract the numerators (tops of the fractions). Thus, we multiply $\frac{4}{5}$ by $\frac{2}{2}$ to get $\frac{8}{10}$. (This is legal because $\frac{2}{2}$ is equal to one). We now have: $\frac{9}{10}$-$\frac{8}{10}$ Because we have the same denominators, we can subtract the numerators to obtain: $\frac{1}{10}$
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