Add 20/15 and 10/81
1st number: 1 5/15, 2nd number: 10/81
20/15 + 10/81 is 118/81.
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,
20/15 = 20 × 27/15 × 27 = 540/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
10/81 = 10 × 5/81 × 5 = 50/405 - Add the two like fractions:
540/405 + 50/405 = 540 + 50/405 = 590/405 - 590/405 simplified gives 118/81
- So, 20/15 + 10/81 = 118/81
In mixed form: 137/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+10/81 20/15+20/81 20/30+10/81 60/15+10/81 20/15+30/81 20/45+10/81 20/15+50/81 20/75+10/81 20/15+70/81