Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 3 - Adding and Subtracting Fractions - Review Exercises: 16

Answer

180

Work Step by Step

15 , 9, 20 Use prime factorization to find the least common multiple of 15 , 9 and 20 Find the prime factorization for each number 15 = 3 * 5 9 = 3 * 3 20 = 2 * 2 * 5 3 and 5 occur most often in the factorization of 15 3 occur most often in the factorization of 9 2 * 2 occur most often in the factorization of 20 L.C.M. = 3 * 5 *3 *2 *2 = 180
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