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Anonymous
It is 15:1.
15":1'
If you mean 15 and 45 then the ratio is: 1 to 3
1 to 1
5:15 or 5/15
The ratio is: 1 to 4
It is 15/150 = 1/10.
2.666 to 1
1 to 3
It is: 1 to 2