Add 90/81 and 20/54
1st number: 1 9/81, 2nd number: 20/54
90/81 + 20/54 is 40/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 54 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
90/81 = 90 × 2/81 × 2 = 180/162 - Likewise, for the 2nd fraction, since 54 × 3 = 162,
20/54 = 20 × 3/54 × 3 = 60/162 - Add the two like fractions:
180/162 + 60/162 = 180 + 60/162 = 240/162 - 240/162 simplified gives 40/27
- So, 90/81 + 20/54 = 40/27
In mixed form: 113/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/81+40/54 90/81+60/54