Add 12/81 and 7/18
12/81 + 7/18 is 29/54.
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,
12/81 = 12 × 2/81 × 2 = 24/162 - Likewise, for the 2nd fraction, since 18 × 9 = 162,
7/18 = 7 × 9/18 × 9 = 63/162 - Add the two like fractions:
24/162 + 63/162 = 24 + 63/162 = 87/162 - 87/162 simplified gives 29/54
- So, 12/81 + 7/18 = 29/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81+7/18 12/81+14/18 12/81+7/36 36/81+7/18 12/81+21/18 12/81+7/54 60/81+7/18 12/81+35/18 12/81+7/90 84/81+7/18 12/81+49/18