Add 9/21 and 28/5
1st number: 9/21, 2nd number: 5 3/5
9/21 + 28/5 is 211/35.
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,
9/21 = 9 × 5/21 × 5 = 45/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
28/5 = 28 × 21/5 × 21 = 588/105 - Add the two like fractions:
45/105 + 588/105 = 45 + 588/105 = 633/105 - 633/105 simplified gives 211/35
- So, 9/21 + 28/5 = 211/35
In mixed form: 61/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+28/5 9/21+56/5 9/42+28/5 9/21+28/10 27/21+28/5 9/21+84/5 9/63+28/5 9/21+28/15 45/21+28/5 9/21+28/25 63/21+28/5 9/21+28/35