Add 30/81 and 7/18
30/81 + 7/18 is 41/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 18 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
30/81 = 30 × 2/81 × 2 = 60/162 - Likewise, for the 2nd fraction, since 18 × 9 = 162,
7/18 = 7 × 9/18 × 9 = 63/162 - Add the two like fractions:
60/162 + 63/162 = 60 + 63/162 = 123/162 - 123/162 simplified gives 41/54
- So, 30/81 + 7/18 = 41/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+7/18 30/81+14/18 30/81+7/36 90/81+7/18 30/81+21/18 30/81+7/54 30/81+35/18 30/81+7/90 30/81+49/18