Add 21/6 and 9/20
1st number: 3 3/6, 2nd number: 9/20
21/6 + 9/20 is 79/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Add the two like fractions:
210/60 + 27/60 = 210 + 27/60 = 237/60 - 237/60 simplified gives 79/20
- So, 21/6 + 9/20 = 79/20
In mixed form: 319/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6+9/20 21/6+18/20 21/12+9/20 21/6+9/40 63/6+9/20 21/6+27/20 21/18+9/20 21/6+9/60 21/6+45/20 21/30+9/20 21/6+63/20 21/42+9/20