Add 40/9 and 2/21
1st number: 4 4/9, 2nd number: 2/21
40/9 + 2/21 is 286/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
40/9 = 40 × 7/9 × 7 = 280/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
2/21 = 2 × 3/21 × 3 = 6/63 - Add the two like fractions:
280/63 + 6/63 = 280 + 6/63 = 286/63 - So, 40/9 + 2/21 = 286/63
In mixed form: 434/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9+2/21 40/9+4/21 40/18+2/21 40/9+2/42 40/9+6/21 40/27+2/21 40/9+2/63 40/9+10/21 40/45+2/21 40/9+14/21 40/63+2/21