Subtract 81/70 from 12/56, Solve 12/56

Subtract 81/70 from 12/56

1^st number: 12/56, 2^nd number: 1 11/70

12/56 - 81/70 is -33/35.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 56 × 5 = 280,
12/56 = 12 × 5/56 × 5 = 60/280
Likewise, for the 2nd fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280
Subtract the two like fractions:
60/280 - 324/280 = 60 - 324/280 = -264/280
After reducing the fraction, the answer is -33/35

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