Add 21/6 and 20/12
1st number: 3 3/6, 2nd number: 1 8/12
21/6 + 20/12 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
20/12 = 20 × 1/12 × 1 = 20/12 - Add the two like fractions:
42/12 + 20/12 = 42 + 20/12 = 62/12 - 62/12 simplified gives 31/6
- So, 21/6 + 20/12 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+20/12 21/6+40/12 21/12+20/12 21/6+20/24 63/6+20/12 21/6+60/12 21/18+20/12 21/6+20/36 21/30+20/12 21/6+20/60 21/42+20/12 21/6+20/84