Add 30/15 and 40/81
1st number: 2 0/15, 2nd number: 40/81
30/15 + 40/81 is 202/81.
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,
30/15 = 30 × 27/15 × 27 = 810/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
40/81 = 40 × 5/81 × 5 = 200/405 - Add the two like fractions:
810/405 + 200/405 = 810 + 200/405 = 1010/405 - 1010/405 simplified gives 202/81
- So, 30/15 + 40/81 = 202/81
In mixed form: 240/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+40/81 30/15+80/81 90/15+40/81 30/45+40/81 30/75+40/81