Add 4/21 and 9/5
1st number: 4/21, 2nd number: 1 4/5
4/21 + 9/5 is 209/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
9/5 = 9 × 21/5 × 21 = 189/105 - Add the two like fractions:
20/105 + 189/105 = 20 + 189/105 = 209/105 - So, 4/21 + 9/5 = 209/105
In mixed form: 1104/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+9/5 4/21+18/5 4/42+9/5 4/21+9/10 12/21+9/5 4/21+27/5 4/63+9/5 4/21+9/15 20/21+9/5 4/21+45/5 4/21+9/25 28/21+9/5 4/21+63/5 4/21+9/35