Add 1/2 and 21/15
1st number: 1/2, 2nd number: 1 6/15
1/2 + 21/15 is 19/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
1/2 = 1 × 15/2 × 15 = 15/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
21/15 = 21 × 2/15 × 2 = 42/30 - Add the two like fractions:
15/30 + 42/30 = 15 + 42/30 = 57/30 - 57/30 simplified gives 19/10
- So, 1/2 + 21/15 = 19/10
In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2+42/15 1/4+21/15 1/2+21/30 3/2+21/15 1/2+63/15 1/6+21/15 1/2+21/45 5/2+21/15 1/10+21/15 1/2+21/75 7/2+21/15 1/14+21/15