Add 10/15 and 40/81
10/15 + 40/81 is 94/81.
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,
10/15 = 10 × 27/15 × 27 = 270/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
40/81 = 40 × 5/81 × 5 = 200/405 - Add the two like fractions:
270/405 + 200/405 = 270 + 200/405 = 470/405 - 470/405 simplified gives 94/81
- So, 10/15 + 40/81 = 94/81
In mixed form: 113/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+40/81 10/15+80/81 10/30+40/81 30/15+40/81 10/45+40/81 50/15+40/81 10/75+40/81 70/15+40/81