Add 3/7 and 7/9
3/7 + 7/9 is 76/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
3/7 = 3 × 9/7 × 9 = 27/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
7/9 = 7 × 7/9 × 7 = 49/63 - Add the two like fractions:
27/63 + 49/63 = 27 + 49/63 = 76/63 - So, 3/7 + 7/9 = 76/63
In mixed form: 113/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7+7/9 3/7+14/9 3/14+7/9 3/7+7/18 9/7+7/9 3/7+21/9 3/21+7/9 3/7+7/27 15/7+7/9 3/7+35/9 3/35+7/9 3/7+7/45 21/7+7/9 3/7+49/9 3/49+7/9 3/7+7/63