Add 40/18 and 21/81
1st number: 2 4/18, 2nd number: 21/81
40/18 + 21/81 is 67/27.
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,
40/18 = 40 × 9/18 × 9 = 360/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
21/81 = 21 × 2/81 × 2 = 42/162 - Add the two like fractions:
360/162 + 42/162 = 360 + 42/162 = 402/162 - 402/162 simplified gives 67/27
- So, 40/18 + 21/81 = 67/27
In mixed form: 213/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18+21/81 40/18+42/81 40/36+21/81 40/18+63/81 40/54+21/81 40/90+21/81