Add 80/9 and 9/21
1st number: 8 8/9, 2nd number: 9/21
80/9 + 9/21 is 587/63.
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,
9/21 = 9 × 3/21 × 3 = 27/63 - Add the two like fractions:
560/63 + 27/63 = 560 + 27/63 = 587/63 - So, 80/9 + 9/21 = 587/63
In mixed form: 920/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9+18/21 80/18+9/21 80/9+9/42 80/9+27/21 80/27+9/21 80/9+9/63 80/9+45/21 80/45+9/21 80/9+63/21 80/63+9/21