Add 81/42 and 6/9
1st number: 1 39/42, 2nd number: 6/9
81/42 + 6/9 is 109/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
81/42 = 81 × 3/42 × 3 = 243/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
6/9 = 6 × 14/9 × 14 = 84/126 - Add the two like fractions:
243/126 + 84/126 = 243 + 84/126 = 327/126 - 327/126 simplified gives 109/42
- So, 81/42 + 6/9 = 109/42
In mixed form: 225/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/42+12/9 81/84+6/9 81/42+6/18 81/42+18/9 81/42+6/27 81/42+30/9 81/42+6/45 81/42+42/9 81/42+6/63