Add 28/21 and 6/12
1st number: 1 7/21, 2nd number: 6/12
28/21 + 6/12 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
28/21 = 28 × 4/21 × 4 = 112/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
6/12 = 6 × 7/12 × 7 = 42/84 - Add the two like fractions:
112/84 + 42/84 = 112 + 42/84 = 154/84 - 154/84 simplified gives 11/6
- So, 28/21 + 6/12 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+6/12 28/42+6/12 28/21+6/24 84/21+6/12 28/21+18/12 28/63+6/12 28/21+6/36 28/21+30/12 28/21+6/60 28/21+42/12 28/21+6/84