Add 7/15 and 7/12
7/15 + 7/12 is 21/20.
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,
7/15 = 7 × 4/15 × 4 = 28/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
7/12 = 7 × 5/12 × 5 = 35/60 - Add the two like fractions:
28/60 + 35/60 = 28 + 35/60 = 63/60 - 63/60 simplified gives 21/20
- So, 7/15 + 7/12 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+7/12 7/15+14/12 7/30+7/12 7/15+7/24 21/15+7/12 7/15+21/12 7/45+7/12 7/15+7/36 35/15+7/12 7/15+35/12 7/75+7/12 7/15+7/60 49/15+7/12 7/15+49/12 7/15+7/84