Answer:
13.) 1:2 = 4:8
14.) 3:9 = 4:12
15.) 3:51 = 1:17
16.) 5:20 = 10:40
17.) 36:72 = 1:2
18.) 12:6 = 10:5
19.) Unintelligable (Some Choices Below)
> 2:4 = 9:18
> 2:4 = 6:12
> 3:4 = 9:12
> 4:6 = 9:12
20.) 1:15 = 2:30
Hope This Helps, Thanks! Have A Nice Day!
(Please Correct Me If I'm Wrong)
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