Add 30/12 and 15/81
1st number: 2 6/12, 2nd number: 15/81
30/12 + 15/81 is 145/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
30/12 = 30 × 27/12 × 27 = 810/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
15/81 = 15 × 4/81 × 4 = 60/324 - Add the two like fractions:
810/324 + 60/324 = 810 + 60/324 = 870/324 - 870/324 simplified gives 145/54
- So, 30/12 + 15/81 = 145/54
In mixed form: 237/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12+15/81 30/12+30/81 30/24+15/81 90/12+15/81 30/12+45/81 30/36+15/81 30/12+75/81 30/60+15/81 30/84+15/81