Question

Which ratios can form a proportion?

A. 9/45, 8/40
B. 8/12, 12/21
C. 8/12, 12/15
D. 9/22, 14/28

Answer 1

A should be the correct answer let me know

Answer 2

A 9/45, 8/40

Explanation:

you could continue with 7/35, 6/30 and so on