Add 18/81 and 8/15
18/81 + 8/15 is 34/45.
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,
8/15 = 8 × 27/15 × 27 = 216/405 - Add the two like fractions:
90/405 + 216/405 = 90 + 216/405 = 306/405 - 306/405 simplified gives 34/45
- So, 18/81 + 8/15 = 34/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+8/15 18/81+16/15 18/81+8/30 54/81+8/15 18/81+24/15 18/81+8/45 90/81+8/15 18/81+40/15 18/81+8/75 18/81+56/15