Subtract 56/81 from 21/10
1st number: 2 1/10, 2nd number: 56/81
21/10 - 56/81 is 1141/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
21/10 = 21 × 81/10 × 81 = 1701/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
56/81 = 56 × 10/81 × 10 = 560/810 - Subtract the two like fractions:
1701/810 - 560/810 = 1701 - 560/810 = 1141/810 - In mixed form: 1331/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-56/81 21/20-56/81 63/10-56/81 21/30-56/81 21/50-56/81 21/70-56/81