Add 28/3 and 7/21
1st number: 9 1/3, 2nd number: 7/21
28/3 + 7/21 is 29/3.
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,
28/3 = 28 × 7/3 × 7 = 196/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
7/21 = 7 × 1/21 × 1 = 7/21 - Add the two like fractions:
196/21 + 7/21 = 196 + 7/21 = 203/21 - 203/21 simplified gives 29/3
- So, 28/3 + 7/21 = 29/3
In mixed form: 92/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3+7/21 28/3+14/21 28/6+7/21 28/3+7/42 84/3+7/21 28/9+7/21 28/3+7/63 28/3+35/21 28/15+7/21 28/3+49/21 28/21+7/21