Add 21/2 and 3/10
1st number: 10 1/2, 2nd number: 3/10
21/2 + 3/10 is 54/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
21/2 = 21 × 5/2 × 5 = 105/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
3/10 = 3 × 1/10 × 1 = 3/10 - Add the two like fractions:
105/10 + 3/10 = 105 + 3/10 = 108/10 - 108/10 simplified gives 54/5
- So, 21/2 + 3/10 = 54/5
In mixed form: 104/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+3/10 21/2+6/10 21/4+3/10 21/2+3/20 63/2+3/10 21/2+9/10 21/6+3/10 21/2+3/30 21/2+15/10 21/10+3/10 21/2+3/50 21/2+21/10 21/14+3/10 21/2+3/70