Add 28/49 and 21/18
1st number: 28/49, 2nd number: 1 3/18
28/49 + 21/18 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 18 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 49 × 18 = 882,
28/49 = 28 × 18/49 × 18 = 504/882 - Likewise, for the 2nd fraction, since 18 × 49 = 882,
21/18 = 21 × 49/18 × 49 = 1029/882 - Add the two like fractions:
504/882 + 1029/882 = 504 + 1029/882 = 1533/882 - 1533/882 simplified gives 73/42
- So, 28/49 + 21/18 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/49+21/18 28/49+42/18 28/98+21/18 28/49+21/36 84/49+21/18 28/49+63/18 28/49+21/54 28/49+21/90