Add 35/21 and 12/9
1st number: 1 14/21, 2nd number: 1 3/9
35/21 + 12/9 is 3/1.
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,
35/21 = 35 × 3/21 × 3 = 105/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Add the two like fractions:
105/63 + 84/63 = 105 + 84/63 = 189/63 - 189/63 simplified gives 3/1
- So, 35/21 + 12/9 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+12/9 35/21+24/9 35/42+12/9 35/21+12/18 35/21+36/9 35/63+12/9 35/21+12/27 35/21+60/9 35/21+12/45 35/21+84/9 35/21+12/63