Add 2/3 and 20/21
2/3 + 20/21 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
2/3 = 2 × 7/3 × 7 = 14/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
20/21 = 20 × 1/21 × 1 = 20/21 - Add the two like fractions:
14/21 + 20/21 = 14 + 20/21 = 34/21 - So, 2/3 + 20/21 = 34/21
In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/3+20/21 2/3+40/21 2/6+20/21 2/3+20/42 6/3+20/21 2/3+60/21 2/9+20/21 2/3+20/63 10/3+20/21 2/15+20/21 14/3+20/21 2/21+20/21