Add 28/2 and 21/12
1st number: 14 0/2, 2nd number: 1 9/12
28/2 + 21/12 is 63/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
28/2 = 28 × 6/2 × 6 = 168/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Add the two like fractions:
168/12 + 21/12 = 168 + 21/12 = 189/12 - 189/12 simplified gives 63/4
- So, 28/2 + 21/12 = 63/4
In mixed form: 153/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/2+21/12 28/2+42/12 28/4+21/12 28/2+21/24 84/2+21/12 28/2+63/12 28/6+21/12 28/2+21/36 28/10+21/12 28/2+21/60 28/14+21/12 28/2+21/84