Add 21/2 and 28/12
1st number: 10 1/2, 2nd number: 2 4/12
21/2 + 28/12 is 77/6.
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,
21/2 = 21 × 6/2 × 6 = 126/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
28/12 = 28 × 1/12 × 1 = 28/12 - Add the two like fractions:
126/12 + 28/12 = 126 + 28/12 = 154/12 - 154/12 simplified gives 77/6
- So, 21/2 + 28/12 = 77/6
In mixed form: 125/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+28/12 21/2+56/12 21/4+28/12 21/2+28/24 63/2+28/12 21/2+84/12 21/6+28/12 21/2+28/36 21/10+28/12 21/2+28/60 21/14+28/12 21/2+28/84