Add 20/18 and 3/81
1st number: 1 2/18, 2nd number: 3/81
20/18 + 3/81 is 31/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
20/18 = 20 × 9/18 × 9 = 180/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
3/81 = 3 × 2/81 × 2 = 6/162 - Add the two like fractions:
180/162 + 6/162 = 180 + 6/162 = 186/162 - 186/162 simplified gives 31/27
- So, 20/18 + 3/81 = 31/27
In mixed form: 14/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+3/81 20/18+6/81 20/36+3/81 60/18+3/81 20/18+9/81 20/54+3/81 20/18+15/81 20/90+3/81 20/18+21/81