Answer
$\frac{2}{3}$
Work Step by Step
$\frac{2}{7}+\frac{8}{21}$
$=\frac{2\times3}{7\times3}+\frac{8\times1}{21\times1}$
$=\frac{6}{21}+\frac{8}{21}$
$=\frac{14}{21}$
$=\frac{2}{3}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 4 - Section 4.5 - Adding and Subtracting Unlike Fractions - Practice - Page 266: 1
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