Add 8/3 and 81/21
1st number: 2 2/3, 2nd number: 3 18/21
8/3 + 81/21 is 137/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
8/3 = 8 × 7/3 × 7 = 56/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
81/21 = 81 × 1/21 × 1 = 81/21 - Add the two like fractions:
56/21 + 81/21 = 56 + 81/21 = 137/21 - So, 8/3 + 81/21 = 137/21
In mixed form: 611/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/3+81/21 8/6+81/21 8/3+81/42 24/3+81/21 8/9+81/21 8/3+81/63 40/3+81/21 8/15+81/21 56/3+81/21 8/21+81/21