Subtract 8/7 from 28/12
1st number: 2 4/12, 2nd number: 1 1/7
28/12 - 8/7 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
28/12 = 28 × 7/12 × 7 = 196/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
8/7 = 8 × 12/7 × 12 = 96/84 - Subtract the two like fractions:
196/84 - 96/84 = 196 - 96/84 = 100/84 - After reducing the fraction, the answer is 25/21
- In mixed form: 14/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-8/7 28/12-16/7 28/24-8/7 28/12-8/14 84/12-8/7 28/12-24/7 28/36-8/7 28/12-8/21 28/12-40/7 28/60-8/7 28/12-8/35 28/12-56/7 28/84-8/7 28/12-8/49