Add 1/2 and 21/30
1/2 + 21/30 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 30 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 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Add the two like fractions:
15/30 + 21/30 = 15 + 21/30 = 36/30 - 36/30 simplified gives 6/5
- So, 1/2 + 21/30 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2+42/30 1/4+21/30 1/2+21/60 3/2+21/30 1/2+63/30 1/6+21/30 1/2+21/90 5/2+21/30 1/10+21/30 7/2+21/30 1/14+21/30