Subtract 80/12 from 81/63
1st number: 1 18/63, 2nd number: 6 8/12
81/63 - 80/12 is -113/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
81/63 = 81 × 4/63 × 4 = 324/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
80/12 = 80 × 21/12 × 21 = 1680/252 - Subtract the two like fractions:
324/252 - 1680/252 = 324 - 1680/252 = -1356/252 - After reducing the fraction, the answer is -113/21
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