Answer
(2 $)/(5 pens)
Work Step by Step
12 for 30 pens.
(12 $)/(30 pens)= (12 $ ÷6)/(30 pens ÷6)= (2 $)/(5 pens)
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 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises - Page 343: 2
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