Subtract 63/56 from 18/42
1st number: 18/42, 2nd number: 1 7/56
18/42 - 63/56 is -39/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
18/42 = 18 × 4/42 × 4 = 72/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
63/56 = 63 × 3/56 × 3 = 189/168 - Subtract the two like fractions:
72/168 - 189/168 = 72 - 189/168 = -117/168 - After reducing the fraction, the answer is -39/56
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