Subtract 72/9 from 56/15
1st number: 3 11/15, 2nd number: 8 0/9
56/15 - 72/9 is -64/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
56/15 = 56 × 3/15 × 3 = 168/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
72/9 = 72 × 5/9 × 5 = 360/45 - Subtract the two like fractions:
168/45 - 360/45 = 168 - 360/45 = -192/45 - After reducing the fraction, the answer is -64/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-72/9 56/15-72/18 56/45-72/9 56/15-72/27 56/75-72/9 56/15-72/45 56/15-72/63