Add 21/2 and 15/3
1st number: 10 1/2, 2nd number: 5 0/3
21/2 + 15/3 is 31/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 3 is 6
Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 2 × 3 = 6,
21/2 = 21 × 3/2 × 3 = 63/6 - Likewise, for the 2nd fraction, since 3 × 2 = 6,
15/3 = 15 × 2/3 × 2 = 30/6 - Add the two like fractions:
63/6 + 30/6 = 63 + 30/6 = 93/6 - 93/6 simplified gives 31/2
- So, 21/2 + 15/3 = 31/2
In mixed form: 151/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+15/3 21/2+30/3 21/4+15/3 21/2+15/6 63/2+15/3 21/2+45/3 21/6+15/3 21/2+15/9 21/2+75/3 21/10+15/3 21/14+15/3 21/2+15/21