Question

Use a proportion to determine the number of children age 5 in a kindergarten class if 80% of a class of 20 children are that age.

A. x=100
B. x=75
C. x=40
D. x=15
E. x=16

Answer 1

16 children

Explanation:

80% of 20 children comes out to 16 children who are of age 5.

If desired, rewrite "80%" as "0.80" and use that 0.80 as the multiplier of 20:

0.80(20 children) = 16 children.