Add 81/12 and 9/30
1st number: 6 9/12, 2nd number: 9/30
81/12 + 9/30 is 141/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
9/30 = 9 × 2/30 × 2 = 18/60 - Add the two like fractions:
405/60 + 18/60 = 405 + 18/60 = 423/60 - 423/60 simplified gives 141/20
- So, 81/12 + 9/30 = 141/20
In mixed form: 71/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+18/30 81/24+9/30 81/12+9/60 81/12+27/30 81/36+9/30 81/12+9/90 81/12+45/30 81/60+9/30 81/12+63/30 81/84+9/30