Answer
$\frac{22}{1}=\frac{55}{2.5}$
Work Step by Step
x is to y is the same as $\frac{x}{y}$
So 22 vanilla wafers is to 1 cup of cookie crumbs as 55 vanilla wafers is to 2.5 cups of cookie crumbs is the same as $\frac{22}{1}=\frac{55}{2.5}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 6 - Section 6.2 - Proportions - Exercise Set - Page 426: 9
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