Add 15/4 and 15/81
1st number: 3 3/4, 2nd number: 15/81
15/4 + 15/81 is 425/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
15/4 = 15 × 81/4 × 81 = 1215/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
15/81 = 15 × 4/81 × 4 = 60/324 - Add the two like fractions:
1215/324 + 60/324 = 1215 + 60/324 = 1275/324 - 1275/324 simplified gives 425/108
- So, 15/4 + 15/81 = 425/108
In mixed form: 3101/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4+15/81 15/4+30/81 15/8+15/81 45/4+15/81 15/4+45/81 15/12+15/81 75/4+15/81 15/4+75/81 15/20+15/81 15/28+15/81