Add 2/72 and 1/81
2/72 + 1/81 is 13/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
2/72 = 2 × 9/72 × 9 = 18/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
1/81 = 1 × 8/81 × 8 = 8/648 - Add the two like fractions:
18/648 + 8/648 = 18 + 8/648 = 26/648 - 26/648 simplified gives 13/324
- So, 2/72 + 1/81 = 13/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/72+1/81 2/72+2/81 6/72+1/81 2/72+3/81 10/72+1/81 2/72+5/81 14/72+1/81 2/72+7/81