Answer
$\frac{1}{25}$
Work Step by Step
The table shows 3 with the AB+ blood type and 1 with the AB- blood type, so 4 ($3+1$) have type AB. The whole set of blood donors contained 100.
$\frac{4}{100}=\frac{4\div4}{100\div4}=\frac{1}{25}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 4 - Section 4.2 - Factors and Simplest Form - Exercise Set - Page 237: 85
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