Add 28/15 and 28/81
1st number: 1 13/15, 2nd number: 28/81
28/15 + 28/81 is 896/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
28/15 = 28 × 27/15 × 27 = 756/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
28/81 = 28 × 5/81 × 5 = 140/405 - Add the two like fractions:
756/405 + 140/405 = 756 + 140/405 = 896/405 - So, 28/15 + 28/81 = 896/405
In mixed form: 286/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15+28/81 28/15+56/81 28/30+28/81 84/15+28/81 28/15+84/81 28/45+28/81 28/75+28/81