Add 20/3 and 7/81
1st number: 6 2/3, 2nd number: 7/81
20/3 + 7/81 is 547/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
20/3 = 20 × 27/3 × 27 = 540/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
7/81 = 7 × 1/81 × 1 = 7/81 - Add the two like fractions:
540/81 + 7/81 = 540 + 7/81 = 547/81 - So, 20/3 + 7/81 = 547/81
In mixed form: 661/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/3+7/81 20/3+14/81 20/6+7/81 60/3+7/81 20/3+21/81 20/9+7/81 20/3+35/81 20/15+7/81 20/3+49/81 20/21+7/81