Add 36/81 and 20/30
36/81 + 20/30 is 10/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
36/81 = 36 × 10/81 × 10 = 360/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
20/30 = 20 × 27/30 × 27 = 540/810 - Add the two like fractions:
360/810 + 540/810 = 360 + 540/810 = 900/810 - 900/810 simplified gives 10/9
- So, 36/81 + 20/30 = 10/9
In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/81+20/30 36/81+40/30 36/81+20/60 36/81+60/30 36/81+20/90