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.

Simplify the larger fractions.

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

To determine which pair of ratios does not form a proportion, you need to compare each pair and check for equality. Here's a step-by-step process to find the answer:

1. Begin by simplifying each ratio in the pair by dividing both the numerator and denominator by their greatest common divisor (GCD) to obtain the simplest form of the ratio.
2. Once you have simplified both ratios, verify if they are equal. If they are equal, the pair forms a proportion. If they are not equal, the pair does not form a proportion.
3. Repeat the process for each given pair of ratios listed in the answer choices.
4. Identify the pair of ratios that do not form a proportion.