Subtract 21/10 from 56/15
1st number: 3 11/15, 2nd number: 2 1/10
56/15 - 21/10 is 49/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
56/15 = 56 × 2/15 × 2 = 112/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Subtract the two like fractions:
112/30 - 63/30 = 112 - 63/30 = 49/30 - In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-42/10 56/30-21/10 56/15-21/20 56/15-63/10 56/45-21/10 56/15-21/30 56/75-21/10 56/15-21/50 56/15-21/70