Add 54/36 and 21/28
1st number: 1 18/36, 2nd number: 21/28
54/36 + 21/28 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
54/36 = 54 × 7/36 × 7 = 378/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252 - Add the two like fractions:
378/252 + 189/252 = 378 + 189/252 = 567/252 - 567/252 simplified gives 9/4
- So, 54/36 + 21/28 = 9/4
In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36+42/28 54/72+21/28 54/36+21/56 54/36+63/28 54/36+21/84