3/20 - 17/100
First make the denominators of both fractions equal.
3/20(5/5) - 17/100 =
15/100 - 17/100
Now subtract.
15/100 - 17/100 = -2/100 = -1/50
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Example: 20/17 minus 1 20/17 minus 17/17 3/17
(-17) - 20 = -37
20 minus 17 minus 3 minus 2 equals -2
97 minus 94 minus 20 is equal to -17.
Divide 17 by 20 and multiply the result by 100.