Add 63/3 and 21/12
1st number: 21 0/3, 2nd number: 1 9/12
63/3 + 21/12 is 91/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
63/3 = 63 × 4/3 × 4 = 252/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Add the two like fractions:
252/12 + 21/12 = 252 + 21/12 = 273/12 - 273/12 simplified gives 91/4
- So, 63/3 + 21/12 = 91/4
In mixed form: 223/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/3+42/12 63/6+21/12 63/3+21/24 63/3+63/12 63/9+21/12 63/3+21/36 63/15+21/12 63/3+21/60 63/21+21/12 63/3+21/84