Add 30/15 and 21/10
1st number: 2 0/15, 2nd number: 2 1/10
30/15 + 21/10 is 41/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
30/15 = 30 × 2/15 × 2 = 60/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Add the two like fractions:
60/30 + 63/30 = 60 + 63/30 = 123/30 - 123/30 simplified gives 41/10
- So, 30/15 + 21/10 = 41/10
In mixed form: 41/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+21/10 30/15+42/10 30/15+21/20 90/15+21/10 30/15+63/10 30/45+21/10 30/15+21/30 30/75+21/10 30/15+21/50 30/15+21/70