Add 81/9 and 81/72
1st number: 9 0/9, 2nd number: 1 9/72
81/9 + 81/72 is 81/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
81/9 = 81 × 8/9 × 8 = 648/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
81/72 = 81 × 1/72 × 1 = 81/72 - Add the two like fractions:
648/72 + 81/72 = 648 + 81/72 = 729/72 - 729/72 simplified gives 81/8
- So, 81/9 + 81/72 = 81/8
In mixed form: 101/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+81/72 81/27+81/72 81/45+81/72 81/63+81/72