Add 18/15 and 10/81
1st number: 1 3/15, 2nd number: 10/81
18/15 + 10/81 is 536/405.
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,
18/15 = 18 × 27/15 × 27 = 486/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
10/81 = 10 × 5/81 × 5 = 50/405 - Add the two like fractions:
486/405 + 50/405 = 486 + 50/405 = 536/405 - So, 18/15 + 10/81 = 536/405
In mixed form: 1131/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+10/81 18/15+20/81 18/30+10/81 54/15+10/81 18/15+30/81 18/45+10/81 90/15+10/81 18/15+50/81 18/75+10/81 18/15+70/81