Add 21/2 and 30/10
1st number: 10 1/2, 2nd number: 3 0/10
21/2 + 30/10 is 27/2.
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,
30/10 = 30 × 1/10 × 1 = 30/10 - Add the two like fractions:
105/10 + 30/10 = 105 + 30/10 = 135/10 - 135/10 simplified gives 27/2
- So, 21/2 + 30/10 = 27/2
In mixed form: 131/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+30/10 21/2+60/10 21/4+30/10 21/2+30/20 63/2+30/10 21/2+90/10 21/6+30/10 21/10+30/10 21/2+30/50 21/14+30/10 21/2+30/70