Subtract 28/21 from 35/12
1st number: 2 11/12, 2nd number: 1 7/21
35/12 - 28/21 is 19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
35/12 = 35 × 7/12 × 7 = 245/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
28/21 = 28 × 4/21 × 4 = 112/84 - Subtract the two like fractions:
245/84 - 112/84 = 245 - 112/84 = 133/84 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/12-28/21 35/12-56/21 35/24-28/21 35/12-28/42 35/12-84/21 35/36-28/21 35/12-28/63 35/60-28/21 35/84-28/21