By dividing all numbers by 10 it is: 12 3 1
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120.
The ratio of 30 to 10 is the same as a ratio of 3 to 1.
30 / 27 = 10 / 9
well to find 30% of 120, first you have to make the percent a decimal, so .30. then all you have to do is mulitiply, so 120*.30=36 :)
84/120=21/30=7/10 7/10