Add 28/36 and 9/81
28/36 + 9/81 is 8/9.
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,
28/36 = 28 × 9/36 × 9 = 252/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
9/81 = 9 × 4/81 × 4 = 36/324 - Add the two like fractions:
252/324 + 36/324 = 252 + 36/324 = 288/324 - 288/324 simplified gives 8/9
- So, 28/36 + 9/81 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/36+9/81 28/36+18/81 28/72+9/81 84/36+9/81 28/36+27/81 28/36+45/81 28/36+63/81