Add 30/81 and 7/9
30/81 + 7/9 is 31/27.
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,
30/81 = 30 × 1/81 × 1 = 30/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
7/9 = 7 × 9/9 × 9 = 63/81 - Add the two like fractions:
30/81 + 63/81 = 30 + 63/81 = 93/81 - 93/81 simplified gives 31/27
- So, 30/81 + 7/9 = 31/27
In mixed form: 14/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+7/9 30/81+14/9 30/81+7/18 90/81+7/9 30/81+21/9 30/81+7/27 30/81+35/9 30/81+7/45 30/81+49/9 30/81+7/63