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: 41


1 inch

Work Step by Step

To find the perimeter, sum the lengths of the sides. Since all 3 are like fractions, no conversion is needed. $\frac{4}{20}+\frac{7}{20}+\frac{9}{20}=\frac{4+7+9}{20}=\frac{20}{20}=1$
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