Subtract 80/27 from 21/56, Solve 21/56

Subtract 80/27 from 21/56

1^st number: 21/56, 2^nd number: 2 26/27

21/56 - 80/27 is -559/216.

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,
21/56 = 21 × 27/56 × 27 = 567/1512
Likewise, for the 2nd fraction, since 27 × 56 = 1512,
80/27 = 80 × 56/27 × 56 = 4480/1512
Subtract the two like fractions:
567/1512 - 4480/1512 = 567 - 4480/1512 = -3913/1512
After reducing the fraction, the answer is -559/216

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