Question

#1 Which pair of ratios form a proportion?

A) 5 : 11 and 6 : 12

B) 7 : 13 and 21 : 39

C) 8 : 14 and 24 : 30

D) 10 : 20 and 20 : 30

#2 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

The first one is B and the second one is B as well.