Add 63/9 and 21/12
1st number: 7 0/9, 2nd number: 1 9/12
63/9 + 21/12 is 35/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
63/9 = 63 × 4/9 × 4 = 252/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
21/12 = 21 × 3/12 × 3 = 63/36 - Add the two like fractions:
252/36 + 63/36 = 252 + 63/36 = 315/36 - 315/36 simplified gives 35/4
- So, 63/9 + 21/12 = 35/4
In mixed form: 83/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/9+42/12 63/18+21/12 63/9+21/24 63/9+63/12 63/27+21/12 63/9+21/36 63/45+21/12 63/9+21/60 63/9+21/84