Subtract 1/42 from 81/56
1st number: 1 25/56, 2nd number: 1/42
81/56 - 1/42 is 239/168.
Steps for subtracting fractions
- 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,
81/56 = 81 × 3/56 × 3 = 243/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
1/42 = 1 × 4/42 × 4 = 4/168 - Subtract the two like fractions:
243/168 - 4/168 = 243 - 4/168 = 239/168 - In mixed form: 171/168
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