Question

Which two ratios form a proportion A) 1/2 and 2/7 B) 2/1 and 7/14 C) 1/2 and 7/14 D) 2/1 and 14/21

Answer 1

1/2 * 2/2  = 2/4  which is not 2/7

2/1 * 7/7 = 14/7  which is not 7/14

1/2 * 7/7 = 7/14 which is 7/14  yes

2/1 * 7/7 = 14/7 which is not 14/21  no

Choice C