Add 4/15 and 7/81
4/15 + 7/81 is 143/405.
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,
4/15 = 4 × 27/15 × 27 = 108/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
7/81 = 7 × 5/81 × 5 = 35/405 - Add the two like fractions:
108/405 + 35/405 = 108 + 35/405 = 143/405 - So, 4/15 + 7/81 = 143/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15+7/81 4/15+14/81 4/30+7/81 12/15+7/81 4/15+21/81 4/45+7/81 20/15+7/81 4/15+35/81 4/75+7/81 28/15+7/81 4/15+49/81