Subtract 20/7 from 56/12
1st number: 4 8/12, 2nd number: 2 6/7
56/12 - 20/7 is 38/21.
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,
56/12 = 56 × 7/12 × 7 = 392/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
20/7 = 20 × 12/7 × 12 = 240/84 - Subtract the two like fractions:
392/84 - 240/84 = 392 - 240/84 = 152/84 - After reducing the fraction, the answer is 38/21
- In mixed form: 117/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-40/7 56/24-20/7 56/12-20/14 56/12-60/7 56/36-20/7 56/12-20/21 56/60-20/7 56/12-20/35 56/84-20/7 56/12-20/49