Add 1/81 and 12/72
1/81 + 12/72 is 29/162.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 72 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
1/81 = 1 × 8/81 × 8 = 8/648 - Likewise, for the 2nd fraction, since 72 × 9 = 648,
12/72 = 12 × 9/72 × 9 = 108/648 - Add the two like fractions:
8/648 + 108/648 = 8 + 108/648 = 116/648 - 116/648 simplified gives 29/162
- So, 1/81 + 12/72 = 29/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81+12/72 1/81+24/72 3/81+12/72 1/81+36/72 5/81+12/72 1/81+60/72 7/81+12/72 1/81+84/72