1.which ratio forms a proportion with 12/15?

a) 21/28
b) 20/25
c) 30/50

2.for the breaststroke, emily swims 100 meters in 62 seconds. if mike swims at the same rate, how long will it take him to swim 200 meters?

a)120 seconds

b)124 seconds

c)118 seconds

3.which pair of ratios forms a proportion?

a) 7/8 , 15/18
b) 1/2 , 14/28
c) 4/5 , 10/13

4.which ratio forms a proportion with 15/45?

a) 3/5
b) 3/12
c) 3/9
d) 1/31

5.which pair of ratios forms a proportion?

a) 5/9 , 15/27
b) 3/10 , 15/25
c) 7/10 , 15/18