Add 35/9 and 12/21
1st number: 3 8/9, 2nd number: 12/21
35/9 + 12/21 is 281/63.
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,
35/9 = 35 × 7/9 × 7 = 245/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Add the two like fractions:
245/63 + 36/63 = 245 + 36/63 = 281/63 - So, 35/9 + 12/21 = 281/63
In mixed form: 429/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/9+12/21 35/9+24/21 35/18+12/21 35/9+12/42 35/9+36/21 35/27+12/21 35/9+12/63 35/9+60/21 35/45+12/21 35/9+84/21 35/63+12/21