Subtract 28/12 from 90/56, Solve 1 34/56

Subtract 28/12 from 90/56

1^st number: 1 34/56, 2^nd number: 2 4/12

90/56 - 28/12 is -61/84.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 12 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168
Likewise, for the 2nd fraction, since 12 × 14 = 168,
28/12 = 28 × 14/12 × 14 = 392/168
Subtract the two like fractions:
270/168 - 392/168 = 270 - 392/168 = -122/168
After reducing the fraction, the answer is -61/84

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