Add 40/3 and 5/21
1st number: 13 1/3, 2nd number: 5/21
40/3 + 5/21 is 95/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
40/3 = 40 × 7/3 × 7 = 280/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
5/21 = 5 × 1/21 × 1 = 5/21 - Add the two like fractions:
280/21 + 5/21 = 280 + 5/21 = 285/21 - 285/21 simplified gives 95/7
- So, 40/3 + 5/21 = 95/7
In mixed form: 134/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/3+5/21 40/3+10/21 40/6+5/21 40/3+5/42 40/3+15/21 40/9+5/21 40/3+5/63 40/3+25/21 40/15+5/21 40/3+35/21 40/21+5/21