Add 81/3 and 81/7
1st number: 27 0/3, 2nd number: 11 4/7
81/3 + 81/7 is 270/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
81/3 = 81 × 7/3 × 7 = 567/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
81/7 = 81 × 3/7 × 3 = 243/21 - Add the two like fractions:
567/21 + 243/21 = 567 + 243/21 = 810/21 - 810/21 simplified gives 270/7
- So, 81/3 + 81/7 = 270/7
In mixed form: 384/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/6+81/7 81/3+81/14 81/9+81/7 81/3+81/21 81/15+81/7 81/3+81/35 81/21+81/7 81/3+81/49