Add 9/28 and 21/5
1st number: 9/28, 2nd number: 4 1/5
9/28 + 21/5 is 633/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
9/28 = 9 × 5/28 × 5 = 45/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
21/5 = 21 × 28/5 × 28 = 588/140 - Add the two like fractions:
45/140 + 588/140 = 45 + 588/140 = 633/140 - So, 9/28 + 21/5 = 633/140
In mixed form: 473/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28+21/5 9/28+42/5 9/56+21/5 9/28+21/10 27/28+21/5 9/28+63/5 9/84+21/5 9/28+21/15 45/28+21/5 9/28+21/25 63/28+21/5 9/28+21/35