Add 7/9 and 12/15
7/9 + 12/15 is 71/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
7/9 = 7 × 5/9 × 5 = 35/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
12/15 = 12 × 3/15 × 3 = 36/45 - Add the two like fractions:
35/45 + 36/45 = 35 + 36/45 = 71/45 - So, 7/9 + 12/15 = 71/45
In mixed form: 126/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9+12/15 7/9+24/15 7/18+12/15 7/9+12/30 21/9+12/15 7/9+36/15 7/27+12/15 7/9+12/45 35/9+12/15 7/9+60/15 7/45+12/15 7/9+12/75 49/9+12/15 7/9+84/15 7/63+12/15