So, I've been stuck in these for quite some time.... can someone help me?

Which ratios can form a proportion?

A) 9/45 , 8/40
B) 8/12 , 12/21
C) 8/12 , 12/15
D) 9/22 , 14/28

I think it might be C but my brain is fried.

Thank you so much,
Jacob

3 answers

Nope.
Simplify both fractions.
8/12 = 2/3
12/15 = 4/5

9/45 = 1/5
8/40 = 1/5

There it is!
Oh ok. I get it now. Thank you so much Ms.Sue. Have a wonderful day!
You're welcome. And you have a great day, too, Jacob.