Add 28/18 and 15/81
1st number: 1 10/18, 2nd number: 15/81
28/18 + 15/81 is 47/27.
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,
28/18 = 28 × 9/18 × 9 = 252/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Add the two like fractions:
252/162 + 30/162 = 252 + 30/162 = 282/162 - 282/162 simplified gives 47/27
- So, 28/18 + 15/81 = 47/27
In mixed form: 120/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+15/81 28/18+30/81 28/36+15/81 84/18+15/81 28/18+45/81 28/54+15/81 28/18+75/81 28/90+15/81