Prealgebra (7th Edition)

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

Chapter 4 - Section 4.4 - Adding and Subtracting Like Fractions, Least Common Denominator, and Equivalent Fractions - Exercise Set - Page 263: 54


LCD is 60.

Work Step by Step

To find the least common denominator factor each denominator then multiply each factor the greatest number of times it occurs in either number. $12=\underline2\times\underline2\times\underline3$ $20=2\times2\times\underline5$ $LCD=2\times2\times3\times5=4\times3\times5=12\times5=60$
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