Subtract 72/9 from 9/12
1st number: 9/12, 2nd number: 8 0/9
9/12 - 72/9 is -29/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
9/12 = 9 × 3/12 × 3 = 27/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
72/9 = 72 × 4/9 × 4 = 288/36 - Subtract the two like fractions:
27/36 - 288/36 = 27 - 288/36 = -261/36 - After reducing the fraction, the answer is -29/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12-72/9 9/24-72/9 9/12-72/18 27/12-72/9 9/36-72/9 9/12-72/27 45/12-72/9 9/60-72/9 9/12-72/45 63/12-72/9 9/84-72/9 9/12-72/63