Math
posted by Wishwash .
I posted a question, but realized due to my multitasking, completely messed up the question.
My question is Which ratios form a proportion?
A. 4/9, 12/25
B. 3/7, 18/42
C. 5/11,20/45
D. 5/8, 15/25
I don't understand how to find the answer, could someone help?
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