Add 35/3 and 28/21
1st number: 11 2/3, 2nd number: 1 7/21
35/3 + 28/21 is 13/1.
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,
35/3 = 35 × 7/3 × 7 = 245/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
28/21 = 28 × 1/21 × 1 = 28/21 - Add the two like fractions:
245/21 + 28/21 = 245 + 28/21 = 273/21 - 273/21 simplified gives 13/1
- So, 35/3 + 28/21 = 13/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/3+28/21 35/3+56/21 35/6+28/21 35/3+28/42 35/3+84/21 35/9+28/21 35/3+28/63 35/15+28/21 35/21+28/21