Add 21/3 and 3/5
1st number: 7 0/3, 2nd number: 3/5
21/3 + 3/5 is 38/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,
21/3 = 21 × 5/3 × 5 = 105/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
3/5 = 3 × 3/5 × 3 = 9/15 - Add the two like fractions:
105/15 + 9/15 = 105 + 9/15 = 114/15 - 114/15 simplified gives 38/5
- So, 21/3 + 3/5 = 38/5
In mixed form: 73/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+3/5 21/3+6/5 21/6+3/5 21/3+3/10 63/3+3/5 21/3+9/5 21/9+3/5 21/3+3/15 21/3+15/5 21/15+3/5 21/3+3/25 21/3+21/5 21/3+3/35