Subtract 21/28 from 5/56
5/56 - 21/28 is -37/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
5/56 = 5 × 1/56 × 1 = 5/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
21/28 = 21 × 2/28 × 2 = 42/56 - Subtract the two like fractions:
5/56 - 42/56 = 5 - 42/56 = -37/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/56-21/28 5/56-42/28 5/56-21/56 15/56-21/28 5/56-63/28 5/56-21/84 25/56-21/28 35/56-21/28