Add 10/21 and 80/9
1st number: 10/21, 2nd number: 8 8/9
10/21 + 80/9 is 590/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
10/21 = 10 × 3/21 × 3 = 30/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
80/9 = 80 × 7/9 × 7 = 560/63 - Add the two like fractions:
30/63 + 560/63 = 30 + 560/63 = 590/63 - So, 10/21 + 80/9 = 590/63
In mixed form: 923/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+80/9 10/42+80/9 10/21+80/18 30/21+80/9 10/63+80/9 10/21+80/27 50/21+80/9 10/21+80/45 70/21+80/9 10/21+80/63