Add 21/9 and 3/45
1st number: 2 3/9, 2nd number: 3/45
21/9 + 3/45 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
3/45 = 3 × 1/45 × 1 = 3/45 - Add the two like fractions:
105/45 + 3/45 = 105 + 3/45 = 108/45 - 108/45 simplified gives 12/5
- So, 21/9 + 3/45 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9+3/45 21/9+6/45 21/18+3/45 21/9+3/90 63/9+3/45 21/9+9/45 21/27+3/45 21/9+15/45 21/45+3/45 21/9+21/45 21/63+3/45