Add 80/9 and 2/21
1st number: 8 8/9, 2nd number: 2/21
80/9 + 2/21 is 566/63.
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,
80/9 = 80 × 7/9 × 7 = 560/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
2/21 = 2 × 3/21 × 3 = 6/63 - Add the two like fractions:
560/63 + 6/63 = 560 + 6/63 = 566/63 - So, 80/9 + 2/21 = 566/63
In mixed form: 862/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9+4/21 80/18+2/21 80/9+2/42 80/9+6/21 80/27+2/21 80/9+2/63 80/9+10/21 80/45+2/21 80/9+14/21 80/63+2/21