Add 28/3 and 72/7
1st number: 9 1/3, 2nd number: 10 2/7
28/3 + 72/7 is 412/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 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 7 × 3 = 21,
72/7 = 72 × 3/7 × 3 = 216/21 - Add the two like fractions:
196/21 + 216/21 = 196 + 216/21 = 412/21 - So, 28/3 + 72/7 = 412/21
In mixed form: 1913/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3+72/7 28/6+72/7 28/3+72/14 84/3+72/7 28/9+72/7 28/3+72/21 28/15+72/7 28/3+72/35 28/21+72/7 28/3+72/49