Subtract 56/18 from 21/10
1st number: 2 1/10, 2nd number: 3 2/18
21/10 - 56/18 is -91/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
56/18 = 56 × 5/18 × 5 = 280/90 - Subtract the two like fractions:
189/90 - 280/90 = 189 - 280/90 = -91/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-56/18 21/20-56/18 21/10-56/36 63/10-56/18 21/30-56/18 21/10-56/54 21/50-56/18 21/10-56/90 21/70-56/18