Subtract 56/16 from 1/21
1st number: 1/21, 2nd number: 3 8/16
1/21 - 56/16 is -145/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
1/21 = 1 × 16/21 × 16 = 16/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
56/16 = 56 × 21/16 × 21 = 1176/336 - Subtract the two like fractions:
16/336 - 1176/336 = 16 - 1176/336 = -1160/336 - After reducing the fraction, the answer is -145/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-56/16 1/42-56/16 1/21-56/32 3/21-56/16 1/63-56/16 1/21-56/48 5/21-56/16 1/21-56/80 7/21-56/16