Add 3/10 and 21/9
1st number: 3/10, 2nd number: 2 3/9
3/10 + 21/9 is 79/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
3/10 = 3 × 9/10 × 9 = 27/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
21/9 = 21 × 10/9 × 10 = 210/90 - Add the two like fractions:
27/90 + 210/90 = 27 + 210/90 = 237/90 - 237/90 simplified gives 79/30
- So, 3/10 + 21/9 = 79/30
In mixed form: 219/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10+21/9 3/10+42/9 3/20+21/9 3/10+21/18 9/10+21/9 3/10+63/9 3/30+21/9 3/10+21/27 15/10+21/9 3/50+21/9 3/10+21/45 21/10+21/9 3/70+21/9 3/10+21/63