Add 1/15 and 18/81
1/15 + 18/81 is 13/45.
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,
1/15 = 1 × 27/15 × 27 = 27/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
18/81 = 18 × 5/81 × 5 = 90/405 - Add the two like fractions:
27/405 + 90/405 = 27 + 90/405 = 117/405 - 117/405 simplified gives 13/45
- So, 1/15 + 18/81 = 13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15+18/81 1/15+36/81 1/30+18/81 3/15+18/81 1/15+54/81 1/45+18/81 5/15+18/81 1/15+90/81 1/75+18/81 7/15+18/81