Subtract 21/12 from 80/63
1st number: 1 17/63, 2nd number: 1 9/12
80/63 - 21/12 is -121/252.
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,
80/63 = 80 × 4/63 × 4 = 320/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
21/12 = 21 × 21/12 × 21 = 441/252 - Subtract the two like fractions:
320/252 - 441/252 = 320 - 441/252 = -121/252
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