What is the ratio 28 : 35 written in lowest terms?

a.
3 : 7

b.
9 : 15

c.
7 : 9

d.
4 : 5

First, look at all of the answers.
It cannot be A because 3 does not go into 28 or 35.
It cannot be B because 9 and 15 both do not go into 28 or 35.
It cannot be C because 9 does not go into 28 or 35.
Even though the only answer left is D, let's just double check. 28 divided by 7 is 4, and 35 divided by 7 is 5. 28:35=4:5. The answer is D.
Hope it helped! :)

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