Subtract 20/8 from 56/7
1st number: 8 0/7, 2nd number: 2 4/8
56/7 - 20/8 is 11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
56/7 = 56 × 8/7 × 8 = 448/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Subtract the two like fractions:
448/56 - 140/56 = 448 - 140/56 = 308/56 - After reducing the fraction, the answer is 11/2
- In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-40/8 56/14-20/8 56/7-20/16 56/7-60/8 56/21-20/8 56/7-20/24 56/35-20/8 56/7-20/40 56/49-20/8 56/7-20/56