Add 18/81 and 10/15
18/81 + 10/15 is 8/9.
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,
10/15 = 10 × 27/15 × 27 = 270/405 - Add the two like fractions:
90/405 + 270/405 = 90 + 270/405 = 360/405 - 360/405 simplified gives 8/9
- So, 18/81 + 10/15 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+10/15 18/81+20/15 18/81+10/30 54/81+10/15 18/81+30/15 18/81+10/45 90/81+10/15 18/81+50/15 18/81+10/75 18/81+70/15