Add 12/3 and 42/81
1st number: 4 0/3, 2nd number: 42/81
12/3 + 42/81 is 122/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
12/3 = 12 × 27/3 × 27 = 324/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
42/81 = 42 × 1/81 × 1 = 42/81 - Add the two like fractions:
324/81 + 42/81 = 324 + 42/81 = 366/81 - 366/81 simplified gives 122/27
- So, 12/3 + 42/81 = 122/27
In mixed form: 414/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3+42/81 12/3+84/81 12/6+42/81 36/3+42/81 12/9+42/81 60/3+42/81 12/15+42/81 84/3+42/81 12/21+42/81