Question

Select the pair(s) of ratios that form a proportion.

a. 24/31 , 20/27
b. 8/9 , 24/36
c. 16/5 , 64/20
d. 6/4 , 15/10

Answer 1

C is the only choice that forms a proportion

Explanation:

a. 24/31, 20/27

(31 is prime)

b. 8/9, 24/36

(this one doesn't work since it would have to be 3/4) which isn't a proportion

c. 16/5, 64/20

(both 16/5 *4 = 64/20) so it works

d. 6/4 , 15/10

(similar situation to choice b the ratio wont work since 6 doesn't go into 15)