Add 45/28 and 21/9
1st number: 1 17/28, 2nd number: 2 3/9
45/28 + 21/9 is 331/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
45/28 = 45 × 9/28 × 9 = 405/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
21/9 = 21 × 28/9 × 28 = 588/252 - Add the two like fractions:
405/252 + 588/252 = 405 + 588/252 = 993/252 - 993/252 simplified gives 331/84
- So, 45/28 + 21/9 = 331/84
In mixed form: 379/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+21/9 45/28+42/9 45/56+21/9 45/28+21/18 45/28+63/9 45/84+21/9 45/28+21/27 45/28+21/45 45/28+21/63