Add 56/7 and 81/20
1st number: 8 0/7, 2nd number: 4 1/20
56/7 + 81/20 is 241/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
56/7 = 56 × 20/7 × 20 = 1120/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Add the two like fractions:
1120/140 + 567/140 = 1120 + 567/140 = 1687/140 - 1687/140 simplified gives 241/20
- So, 56/7 + 81/20 = 241/20
In mixed form: 121/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/14+81/20 56/7+81/40 56/21+81/20 56/7+81/60 56/35+81/20 56/49+81/20