Subtract 72/27 from 12/56, Solve 12/56

Subtract 72/27 from 12/56

1^st number: 12/56, 2^nd number: 2 18/27

12/56 - 72/27 is -103/42.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 27 is 1512

Next, find the equivalent fraction of both fractional numbers with denominator 1512
For the 1st fraction, since 56 × 27 = 1512,
12/56 = 12 × 27/56 × 27 = 324/1512
Likewise, for the 2nd fraction, since 27 × 56 = 1512,
72/27 = 72 × 56/27 × 56 = 4032/1512
Subtract the two like fractions:
324/1512 - 4032/1512 = 324 - 4032/1512 = -3708/1512
After reducing the fraction, the answer is -103/42

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