Add 42/18 and 40/81
1st number: 2 6/18, 2nd number: 40/81
42/18 + 40/81 is 229/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
42/18 = 42 × 9/18 × 9 = 378/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
40/81 = 40 × 2/81 × 2 = 80/162 - Add the two like fractions:
378/162 + 80/162 = 378 + 80/162 = 458/162 - 458/162 simplified gives 229/81
- So, 42/18 + 40/81 = 229/81
In mixed form: 267/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+40/81 42/18+80/81 42/36+40/81 42/54+40/81 42/90+40/81