Add 2/3 and 42/21
1st number: 2/3, 2nd number: 2 0/21
2/3 + 42/21 is 8/3.
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,
42/21 = 42 × 1/21 × 1 = 42/21 - Add the two like fractions:
14/21 + 42/21 = 14 + 42/21 = 56/21 - 56/21 simplified gives 8/3
- So, 2/3 + 42/21 = 8/3
In mixed form: 22/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/3+42/21 2/3+84/21 2/6+42/21 6/3+42/21 2/9+42/21 2/3+42/63 10/3+42/21 2/15+42/21 14/3+42/21 2/21+42/21