Add 28/15 and 28/12
1st number: 1 13/15, 2nd number: 2 4/12
28/15 + 28/12 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
28/15 = 28 × 4/15 × 4 = 112/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
28/12 = 28 × 5/12 × 5 = 140/60 - Add the two like fractions:
112/60 + 140/60 = 112 + 140/60 = 252/60 - 252/60 simplified gives 21/5
- So, 28/15 + 28/12 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15+28/12 28/15+56/12 28/30+28/12 28/15+28/24 84/15+28/12 28/15+84/12 28/45+28/12 28/15+28/36 28/75+28/12 28/15+28/60 28/15+28/84