Subtract 18/42 from 72/56, Solve 1 16/56

Subtract 18/42 from 72/56

1^st number: 1 16/56, 2^nd number: 18/42

72/56 - 18/42 is 6/7.

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,
72/56 = 72 × 3/56 × 3 = 216/168
Likewise, for the 2nd fraction, since 42 × 4 = 168,
18/42 = 18 × 4/42 × 4 = 72/168
Subtract the two like fractions:
216/168 - 72/168 = 216 - 72/168 = 144/168
After reducing the fraction, the answer is 6/7

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