Subtract 7/56 from 9/90, Solve 9/90

Subtract 7/56 from 9/90

9/90 - 7/56 is -1/40.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 90 × 28 = 2520,
9/90 = 9 × 28/90 × 28 = 252/2520
Likewise, for the 2nd fraction, since 56 × 45 = 2520,
7/56 = 7 × 45/56 × 45 = 315/2520
Subtract the two like fractions:
252/2520 - 315/2520 = 252 - 315/2520 = -63/2520
After reducing the fraction, the answer is -1/40

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