Add 7/72 and 3/81
7/72 + 3/81 is 29/216.
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,
7/72 = 7 × 9/72 × 9 = 63/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
3/81 = 3 × 8/81 × 8 = 24/648 - Add the two like fractions:
63/648 + 24/648 = 63 + 24/648 = 87/648 - 87/648 simplified gives 29/216
- So, 7/72 + 3/81 = 29/216
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72+3/81 7/72+6/81 21/72+3/81 7/72+9/81 35/72+3/81 7/72+15/81 49/72+3/81 7/72+21/81