Add 30/18 and 15/81
1st number: 1 12/18, 2nd number: 15/81
30/18 + 15/81 is 50/27.
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,
30/18 = 30 × 9/18 × 9 = 270/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Add the two like fractions:
270/162 + 30/162 = 270 + 30/162 = 300/162 - 300/162 simplified gives 50/27
- So, 30/18 + 15/81 = 50/27
In mixed form: 123/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+15/81 30/18+30/81 30/36+15/81 90/18+15/81 30/18+45/81 30/54+15/81 30/18+75/81 30/90+15/81