1. 12/100 = 21/x
2. Solve for x 3. x=175
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Twenty percent of sixty is twelve. This is because you can find twenty percent of a number by multiplying it by 0.20, which in this case gives you twelve.
12
One hundred and twenty
12
30% of 40% = 12%. 20% of anything is a fifth so 12% x 5 = 60%