Question

1. Which ratios form a proportion? Use equivalent ratios to test each pair.
A. 4/9, 2/3
B. 6/15, 9/12
C. 12/16, 15/20
D. 18/ 20, 24/30

2. Which ratio forms a proportion with 20/30? Use equivalent ratios to test each ratio.
A. 16/24
B. 10/20
C. 17/51
D. 16/60

3. Which ratios form a proportion? Use cross products to test each pair.
A. 15/40, 35/90
B. 18/22, 45/55
C. 12/55, 33/121
D. 17/31, 32/45