Subtract 21/16 from 7/56
1st number: 7/56, 2nd number: 1 5/16
7/56 - 21/16 is -19/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 56 × 2 = 112,
7/56 = 7 × 2/56 × 2 = 14/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
21/16 = 21 × 7/16 × 7 = 147/112 - Subtract the two like fractions:
14/112 - 147/112 = 14 - 147/112 = -133/112 - After reducing the fraction, the answer is -19/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/56-21/16 7/56-42/16 7/56-21/32 21/56-21/16 7/56-63/16 7/56-21/48 35/56-21/16 7/56-21/80 49/56-21/16