Add 21/56 and 28/9
1st number: 21/56, 2nd number: 3 1/9
21/56 + 28/9 is 251/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 9 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
21/56 = 21 × 9/56 × 9 = 189/504 - Likewise, for the 2nd fraction, since 9 × 56 = 504,
28/9 = 28 × 56/9 × 56 = 1568/504 - Add the two like fractions:
189/504 + 1568/504 = 189 + 1568/504 = 1757/504 - 1757/504 simplified gives 251/72
- So, 21/56 + 28/9 = 251/72
In mixed form: 335/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+28/9 21/56+56/9 21/56+28/18 63/56+28/9 21/56+84/9 21/56+28/27 21/56+28/45 21/56+28/63