Answer:
See below.
Explanation:
You can reduce a ratio just like you reduce a fraction. Divide both numbers by the same number.
Divide 16 and 12 by 4.
16:12 = 4:3
Now to get equivalent ratios, multiply both numbers, 4 and 3, by the same number.
4:3 = 8:6 = 12:9 = 16:12 = 20:15 = 24:18 = 28:21 = 32:24 = 36:27 = 40:30, etc.