Question

Which ratio is equal to 15:20?
a: 5:10
b: 18:25
c:21:28
d: 24:30

Answer 1

C - 21:28

Explanation:

this is solved by a little bit of trial and error. divide the possible answer numerators by 15, and check if it's the same for the denominator.

For C I did this:

Divided the denominators: 28 ÷ 20 = 1.4....so that's 1.4.

Let's test it out for the numerator now. 21 ÷ 15 = 1.4.

So there's your answer.