Add 18/81 and 18/15
1st number: 18/81, 2nd number: 1 3/15
18/81 + 18/15 is 64/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 15 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
18/81 = 18 × 5/81 × 5 = 90/405 - Likewise, for the 2nd fraction, since 15 × 27 = 405,
18/15 = 18 × 27/15 × 27 = 486/405 - Add the two like fractions:
90/405 + 486/405 = 90 + 486/405 = 576/405 - 576/405 simplified gives 64/45
- So, 18/81 + 18/15 = 64/45
In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+18/15 18/81+36/15 18/81+18/30 54/81+18/15 18/81+54/15 18/81+18/45 90/81+18/15 18/81+90/15 18/81+18/75