Add 30/9 and 8/21
1st number: 3 3/9, 2nd number: 8/21
30/9 + 8/21 is 26/7.
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,
30/9 = 30 × 7/9 × 7 = 210/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
8/21 = 8 × 3/21 × 3 = 24/63 - Add the two like fractions:
210/63 + 24/63 = 210 + 24/63 = 234/63 - 234/63 simplified gives 26/7
- So, 30/9 + 8/21 = 26/7
In mixed form: 35/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9+8/21 30/9+16/21 30/18+8/21 30/9+8/42 90/9+8/21 30/9+24/21 30/27+8/21 30/9+8/63 30/9+40/21 30/45+8/21 30/9+56/21 30/63+8/21