Add 12/3 and 20/81
1st number: 4 0/3, 2nd number: 20/81
12/3 + 20/81 is 344/81.
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,
20/81 = 20 × 1/81 × 1 = 20/81 - Add the two like fractions:
324/81 + 20/81 = 324 + 20/81 = 344/81 - So, 12/3 + 20/81 = 344/81
In mixed form: 420/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3+20/81 12/3+40/81 12/6+20/81 36/3+20/81 12/3+60/81 12/9+20/81 60/3+20/81 12/15+20/81 84/3+20/81 12/21+20/81