Subtract 21/8 from 16/56
1st number: 16/56, 2nd number: 2 5/8
16/56 - 21/8 is -131/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
16/56 = 16 × 1/56 × 1 = 16/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Subtract the two like fractions:
16/56 - 147/56 = 16 - 147/56 = -131/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/56-21/8 16/56-42/8 16/56-21/16 48/56-21/8 16/56-63/8 16/56-21/24 80/56-21/8 16/56-21/40 16/56-21/56