Add 40/21 and 3/18
1st number: 1 19/21, 2nd number: 3/18
40/21 + 3/18 is 29/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
40/21 = 40 × 6/21 × 6 = 240/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Add the two like fractions:
240/126 + 21/126 = 240 + 21/126 = 261/126 - 261/126 simplified gives 29/14
- So, 40/21 + 3/18 = 29/14
In mixed form: 21/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+3/18 40/21+6/18 40/42+3/18 40/21+3/36 40/21+9/18 40/63+3/18 40/21+3/54 40/21+15/18 40/21+3/90 40/21+21/18