Answer
-7
Work Step by Step
Multiply across the numerators and denominators to find the product. Opposite signs make a negative answer while same signs make a positive answer.
$\frac{1}{3}(-21)=-\frac{1\times21}{3\times1}=-\frac{21}{3}=-7$
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.7 - Multiplication and Division of Real Numbers - Exercise Set - Page 84: 12
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