Add 15/12 and 5/81
1st number: 1 3/12, 2nd number: 5/81
15/12 + 5/81 is 425/324.
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,
15/12 = 15 × 27/12 × 27 = 405/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
5/81 = 5 × 4/81 × 4 = 20/324 - Add the two like fractions:
405/324 + 20/324 = 405 + 20/324 = 425/324 - So, 15/12 + 5/81 = 425/324
In mixed form: 1101/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+5/81 15/12+10/81 15/24+5/81 45/12+5/81 15/12+15/81 15/36+5/81 75/12+5/81 15/12+25/81 15/60+5/81 15/12+35/81 15/84+5/81