Subtract 72/21 from 63/56
1st number: 1 7/56, 2nd number: 3 9/21
63/56 - 72/21 is -129/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
63/56 = 63 × 3/56 × 3 = 189/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
72/21 = 72 × 8/21 × 8 = 576/168 - Subtract the two like fractions:
189/168 - 576/168 = 189 - 576/168 = -387/168 - After reducing the fraction, the answer is -129/56
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