Answer
775 freshmen
Work Step by Step
$\frac{p}{100}=\frac{a}{b}$
Cross multiply to solve the percent proportion.
$\frac{4}{100}=\frac{31}{b}$
$4b=100\times31$
$4b\div4=3100\div4$
$b=775$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Cumulative Review - Page 731: 37
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