Add 70/72 and 35/81
70/72 + 35/81 is 455/324.
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,
70/72 = 70 × 9/72 × 9 = 630/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
35/81 = 35 × 8/81 × 8 = 280/648 - Add the two like fractions:
630/648 + 280/648 = 630 + 280/648 = 910/648 - 910/648 simplified gives 455/324
- So, 70/72 + 35/81 = 455/324
In mixed form: 1131/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72+70/81