Subtract 4/12 from 20/63
20/63 - 4/12 is -1/63.
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,
20/63 = 20 × 4/63 × 4 = 80/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
4/12 = 4 × 21/12 × 21 = 84/252 - Subtract the two like fractions:
80/252 - 84/252 = 80 - 84/252 = -4/252 - After reducing the fraction, the answer is -1/63
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