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 - 1-4 Properties of Real Numbers - Practice and Problem-Solving Exercises - Page 28: 68



Work Step by Step

We first multiply 5/9 by 10/10 and 5/10 by 9/9 (this is legal because 9/9 and 10/10 equal 1) to create a common denominator, which allows us to subtract the two expressions. Thus, we obtain: $\frac{50}{90}$-$\frac{45}{90}$=$\frac{5}{90}$=$\frac{1}{18}$
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