Add 56/3 and 42/21
1st number: 18 2/3, 2nd number: 2 0/21
56/3 + 42/21 is 62/3.
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,
56/3 = 56 × 7/3 × 7 = 392/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
42/21 = 42 × 1/21 × 1 = 42/21 - Add the two like fractions:
392/21 + 42/21 = 392 + 42/21 = 434/21 - 434/21 simplified gives 62/3
- So, 56/3 + 42/21 = 62/3
In mixed form: 202/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3+84/21 56/6+42/21 56/9+42/21 56/3+42/63 56/15+42/21 56/21+42/21