Question

Which ratio is NOT proportionate to 15/45 ?

3/9


3/15


1/3


30/90

Answer 1

Hey there, Lets solve this step by step.

Question = Which ratio is NOT proportionate to 15/45 ?

A proportion is an equation written in the form stating that two ratios are equivalent.

15/45 ⊄ 3/15

Cross multiply:
15 * 15 = 45 * 3

Simplifying
15 * 15 = 45 * 3

Multiply 15 * 15
225 = 45 * 3

Multiply 45 * 3
225 = 135

Solving 225 = 135

The left and right sides are not equal, therefore there is no solution.

Answer 2

15/45 simplify is 1/3.
3/9 _ is 1/3
3/15 _ is 1/5
1/3 is 1/3
30/60 is 1/2
So 3/15 and 30/60 are the correct answers