Add 21/12 and 6/8
1st number: 1 9/12, 2nd number: 6/8
21/12 + 6/8 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
6/8 = 6 × 3/8 × 3 = 18/24 - Add the two like fractions:
42/24 + 18/24 = 42 + 18/24 = 60/24 - 60/24 simplified gives 5/2
- So, 21/12 + 6/8 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+6/8 21/12+12/8 21/24+6/8 21/12+6/16 63/12+6/8 21/12+18/8 21/36+6/8 21/12+6/24 21/12+30/8 21/60+6/8 21/12+6/40 21/12+42/8 21/84+6/8 21/12+6/56