Add 7/81 and 7/9
7/81 + 7/9 is 70/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 9 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 81 × 1 = 81,
7/81 = 7 × 1/81 × 1 = 7/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
7/9 = 7 × 9/9 × 9 = 63/81 - Add the two like fractions:
7/81 + 63/81 = 7 + 63/81 = 70/81 - So, 7/81 + 7/9 = 70/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/81+7/9 7/81+14/9 7/81+7/18 21/81+7/9 7/81+21/9 7/81+7/27 35/81+7/9 7/81+35/9 7/81+7/45 49/81+7/9 7/81+49/9 7/81+7/63