Subtract 21/20 from 3/56
1st number: 3/56, 2nd number: 1 1/20
3/56 - 21/20 is -279/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
3/56 = 3 × 5/56 × 5 = 15/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
21/20 = 21 × 14/20 × 14 = 294/280 - Subtract the two like fractions:
15/280 - 294/280 = 15 - 294/280 = -279/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/56-21/20 3/56-42/20 3/56-21/40 9/56-21/20 3/56-63/20 3/56-21/60 15/56-21/20 21/56-21/20