Which pair of ratios does NOT form a proportion?

A. 3/5, 24/40
B. 30/10,15/5
C. 9/14, 3/4
D. 7/12, 14/24
Help please!!!!!!!!!!!!!! Dont give me the answer, just tell me how to answer it.

1 answer

Simplify the larger fractions.

Example: 24/40. Divide both the numerator and denominator by 8. 24/40 = 3/5
So A forms a proportion.
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