Add 7/15 and 21/9
1st number: 7/15, 2nd number: 2 3/9
7/15 + 21/9 is 14/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
7/15 = 7 × 3/15 × 3 = 21/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Add the two like fractions:
21/45 + 105/45 = 21 + 105/45 = 126/45 - 126/45 simplified gives 14/5
- So, 7/15 + 21/9 = 14/5
In mixed form: 24/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+21/9 7/15+42/9 7/30+21/9 7/15+21/18 21/15+21/9 7/15+63/9 7/45+21/9 7/15+21/27 35/15+21/9 7/75+21/9 7/15+21/45 49/15+21/9 7/15+21/63