Subtract 72/63 from 21/12
1st number: 1 9/12, 2nd number: 1 9/63
21/12 - 72/63 is 17/28.
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,
21/12 = 21 × 21/12 × 21 = 441/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
72/63 = 72 × 4/63 × 4 = 288/252 - Subtract the two like fractions:
441/252 - 288/252 = 441 - 288/252 = 153/252 - After reducing the fraction, the answer is 17/28
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