Subtract 63/42 from 90/56, Solve 1 34/56

Subtract 63/42 from 90/56

1^st number: 1 34/56, 2^nd number: 1 21/42

90/56 - 63/42 is 3/28.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 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 42 × 4 = 168,
63/42 = 63 × 4/42 × 4 = 252/168
Subtract the two like fractions:
270/168 - 252/168 = 270 - 252/168 = 18/168
After reducing the fraction, the answer is 3/28

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