Question

Which two ratios represent quantities that are proportional

(my school has not explained this very well so if you could ty)
A: 5/7 and 7/14
B:56/64 and 36/48
C:21/28 and 12/16
D: 9/10 and 10/9

Answer 1

C

Explanation:

Ratios are proportional if they can be simplified to the same fraction.

21/28 is equal to 12/16.

21/28 can be divided by 7 to make 3/4.

12/16 can be divided by 4 to make 3/4.

3/4 is equal to 3/4