Answer
a. 84%
b. 72%
c. 30%
Work Step by Step
a.
$21\div25 = 0.84$
$0.84\times100 = 84\%$
b.
$56+22=78$
$56/78=0.717$
$0.717*100=72\%$
c.
$11+5+7=23$
$7/23=0.30$
$0.30*100 = 30\%$
General, Organic, and Biological Chemistry: Structures of Life (5th Edition)
by Timberlake, Karen C.
Published by
Pearson
ISBN 10:
0321967461
ISBN 13:
978-0-32196-746-6
Chapter 1 - Chemistry in Our Lives - 1.4 Key Math Skills for Chemistry - Questions and Problems - Page 18: 1.19
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