Add 2/81 and 2/90
2/81 + 2/90 is 19/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 90 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
2/81 = 2 × 10/81 × 10 = 20/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
2/90 = 2 × 9/90 × 9 = 18/810 - Add the two like fractions:
20/810 + 18/810 = 20 + 18/810 = 38/810 - 38/810 simplified gives 19/405
- So, 2/81 + 2/90 = 19/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81+2/90 2/81+4/90 6/81+2/90 2/81+6/90 10/81+2/90 2/81+10/90 14/81+2/90 2/81+14/90