Add 7/3 and 7/21
1st number: 2 1/3, 2nd number: 7/21
7/3 + 7/21 is 8/3.
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,
7/3 = 7 × 7/3 × 7 = 49/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
7/21 = 7 × 1/21 × 1 = 7/21 - Add the two like fractions:
49/21 + 7/21 = 49 + 7/21 = 56/21 - 56/21 simplified gives 8/3
- So, 7/3 + 7/21 = 8/3
In mixed form: 22/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/3+7/21 7/3+14/21 7/6+7/21 7/3+7/42 21/3+7/21 7/9+7/21 7/3+7/63 35/3+7/21 7/3+35/21 7/15+7/21 49/3+7/21 7/3+49/21 7/21+7/21