Question

Use a common denominator to determine whether the ratios form a proportion.

6 : 15 and 30 : 80

A.
Yes. They form a proportion.

B.
No. They do not form a proportion.

Answer 1

They do not form a proportion so the answer is B

Answer 2

B is the correct answer. you can not multiply the first ratio be anything to make it equal the 2nd.