Subtract 8/7 from 56/54, Solve 1 2/54

Subtract 8/7 from 56/54

1^st number: 1 2/54, 2^nd number: 1 1/7

56/54 - 8/7 is -20/189.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
56/54 = 56 × 7/54 × 7 = 392/378
Likewise, for the 2nd fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378
Subtract the two like fractions:
392/378 - 432/378 = 392 - 432/378 = -40/378
After reducing the fraction, the answer is -20/189

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