Add 5/10 and 21/30
5/10 + 21/30 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
5/10 = 5 × 3/10 × 3 = 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, 5/10 + 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: 5/10+42/30 5/20+21/30 5/10+21/60 15/10+21/30 5/10+63/30 5/30+21/30 5/10+21/90 25/10+21/30 5/50+21/30 35/10+21/30 5/70+21/30