Add 30/81 and 63/12
1st number: 30/81, 2nd number: 5 3/12
30/81 + 63/12 is 607/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
30/81 = 30 × 4/81 × 4 = 120/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
63/12 = 63 × 27/12 × 27 = 1701/324 - Add the two like fractions:
120/324 + 1701/324 = 120 + 1701/324 = 1821/324 - 1821/324 simplified gives 607/108
- So, 30/81 + 63/12 = 607/108
In mixed form: 567/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+63/12 30/81+63/24 90/81+63/12 30/81+63/36 30/81+63/60 30/81+63/84