Subtract 28/16 from 2/21
1st number: 2/21, 2nd number: 1 12/16
2/21 - 28/16 is -139/84.
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,
2/21 = 2 × 16/21 × 16 = 32/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
28/16 = 28 × 21/16 × 21 = 588/336 - Subtract the two like fractions:
32/336 - 588/336 = 32 - 588/336 = -556/336 - After reducing the fraction, the answer is -139/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-28/16 2/21-56/16 2/42-28/16 2/21-28/32 6/21-28/16 2/21-84/16 2/63-28/16 2/21-28/48 10/21-28/16 2/21-28/80 14/21-28/16