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20/100 x Y = 15 so 15 x 100/20 = 75
3/20 - 17/100First make the denominators of both fractions equal.3/20(5/5) - 17/100 =15/100 - 17/100Now subtract.15/100 - 17/100 = -2/100 = -1/50
A percentage is always something over 100. So you simply need to multiply your fraction to get the denominator (20) to be 100. You can do this by multiplying by five: 3 x 5 = 15 20 x 5 = 100 This give you 15/100 which is equal to 15% Another way is my typing the fraction into a calculator and then multiplying by 100.
.15 decimal is equal to fraction 15/100 or 3/20.
15/100 = 3/20