Add 5/21 and 63/12
1st number: 5/21, 2nd number: 5 3/12
5/21 + 63/12 is 461/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Add the two like fractions:
20/84 + 441/84 = 20 + 441/84 = 461/84 - So, 5/21 + 63/12 = 461/84
In mixed form: 541/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+63/12 5/42+63/12 5/21+63/24 15/21+63/12 5/63+63/12 5/21+63/36 25/21+63/12 5/21+63/60 35/21+63/12 5/21+63/84