Add 80/36 and 21/81
1st number: 2 8/36, 2nd number: 21/81
80/36 + 21/81 is 67/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
80/36 = 80 × 9/36 × 9 = 720/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
21/81 = 21 × 4/81 × 4 = 84/324 - Add the two like fractions:
720/324 + 84/324 = 720 + 84/324 = 804/324 - 804/324 simplified gives 67/27
- So, 80/36 + 21/81 = 67/27
In mixed form: 213/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/36+42/81 80/72+21/81 80/36+63/81