Add 20/35 and 81/7
1st number: 20/35, 2nd number: 11 4/7
20/35 + 81/7 is 85/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 35 × 1 = 35,
20/35 = 20 × 1/35 × 1 = 20/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
81/7 = 81 × 5/7 × 5 = 405/35 - Add the two like fractions:
20/35 + 405/35 = 20 + 405/35 = 425/35 - 425/35 simplified gives 85/7
- So, 20/35 + 81/7 = 85/7
In mixed form: 121/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/35+81/7 20/70+81/7 20/35+81/14 60/35+81/7 20/35+81/21 20/35+81/35 20/35+81/49