Answer
$\frac{20}{5}=\frac{4}{1}$
Work Step by Step
x is to y is the same as $\frac{x}{y}$
So 20 students is to 5 microscopes as 4 students is to 1 microscope is the same as $\frac{20}{5}=\frac{4}{1}$
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: 3
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