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It is 20/10 = 2.
20
20/2 = 10 Therefore the ratio is 1 : 10
The ratio is: 2 to 1
10.
It is: 10 to 7
It is: 3 to 10
200:10 = 20:1
It is: 10 to 20
It is 20/2 = 10
2, or 2 to 1.