Add 56/3 and 12/21
1st number: 18 2/3, 2nd number: 12/21
56/3 + 12/21 is 404/21.
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,
56/3 = 56 × 7/3 × 7 = 392/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
12/21 = 12 × 1/21 × 1 = 12/21 - Add the two like fractions:
392/21 + 12/21 = 392 + 12/21 = 404/21 - So, 56/3 + 12/21 = 404/21
In mixed form: 195/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3+24/21 56/6+12/21 56/3+12/42 56/3+36/21 56/9+12/21 56/3+12/63 56/3+60/21 56/15+12/21 56/3+84/21 56/21+12/21