Subtract 63/42 from 56/54, Solve 1 2/54

Subtract 63/42 from 56/54

1^st number: 1 2/54, 2^nd number: 1 21/42

56/54 - 63/42 is -25/54.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 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 42 × 9 = 378,
63/42 = 63 × 9/42 × 9 = 567/378
Subtract the two like fractions:
392/378 - 567/378 = 392 - 567/378 = -175/378
After reducing the fraction, the answer is -25/54

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