Subtract 72/63 from 9/12
1st number: 9/12, 2nd number: 1 9/63
9/12 - 72/63 is -11/28.
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,
9/12 = 9 × 21/12 × 21 = 189/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
72/63 = 72 × 4/63 × 4 = 288/252 - Subtract the two like fractions:
189/252 - 288/252 = 189 - 288/252 = -99/252 - After reducing the fraction, the answer is -11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12-72/63 9/24-72/63 27/12-72/63 9/36-72/63 45/12-72/63 9/60-72/63 63/12-72/63 9/84-72/63