Answer
$\frac{1}{2}$
Work Step by Step
$\frac{90}{180}=\frac{2\times3\times3\times5}{2\times2\times3\times3\times5}=\frac{2\times3\times3\times5}{2\times3\times3\times5}\times\frac{1}{2}=1\times\frac{1}{2}=\frac{1}{2}$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 2 - Multiplying and Dividing Fractions - 2.4 Writing a Fraction in Lowest Terms - 2.4 Exercises - Page 137: 37
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