Add 5/9 and 15/81
5/9 + 15/81 is 20/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
5/9 = 5 × 9/9 × 9 = 45/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
15/81 = 15 × 1/81 × 1 = 15/81 - Add the two like fractions:
45/81 + 15/81 = 45 + 15/81 = 60/81 - 60/81 simplified gives 20/27
- So, 5/9 + 15/81 = 20/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/9+15/81 5/9+30/81 5/18+15/81 15/9+15/81 5/9+45/81 5/27+15/81 25/9+15/81 5/9+75/81 5/45+15/81 35/9+15/81 5/63+15/81