Add 90/81 and 20/9
1st number: 1 9/81, 2nd number: 2 2/9
90/81 + 20/9 is 10/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 9 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 81 × 1 = 81,
90/81 = 90 × 1/81 × 1 = 90/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
20/9 = 20 × 9/9 × 9 = 180/81 - Add the two like fractions:
90/81 + 180/81 = 90 + 180/81 = 270/81 - 270/81 simplified gives 10/3
- So, 90/81 + 20/9 = 10/3
In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/81+40/9 90/81+20/18 90/81+60/9 90/81+20/27 90/81+20/45 90/81+20/63