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 - Exercise Set - Page 273: 17



Work Step by Step

LCD is 99. $\frac{5a}{11}+\frac{4a}{9}=\frac{5a\times9}{11\times9}+\frac{4a\times11}{9\times11}=\frac{45a}{99}+\frac{44a}{99}=\frac{45a+44a}{99}=\frac{89a}{99}$
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