Subtract 81/63 from 20/12
1st number: 1 8/12, 2nd number: 1 18/63
20/12 - 81/63 is 8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
20/12 = 20 × 21/12 × 21 = 420/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
81/63 = 81 × 4/63 × 4 = 324/252 - Subtract the two like fractions:
420/252 - 324/252 = 420 - 324/252 = 96/252 - After reducing the fraction, the answer is 8/21
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