Add 21/6 and 18/81
1st number: 3 3/6, 2nd number: 18/81
21/6 + 18/81 is 67/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 6 × 27 = 162,
21/6 = 21 × 27/6 × 27 = 567/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
18/81 = 18 × 2/81 × 2 = 36/162 - Add the two like fractions:
567/162 + 36/162 = 567 + 36/162 = 603/162 - 603/162 simplified gives 67/18
- So, 21/6 + 18/81 = 67/18
In mixed form: 313/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+18/81 21/6+36/81 21/12+18/81 63/6+18/81 21/6+54/81 21/18+18/81 21/6+90/81 21/30+18/81 21/42+18/81