Add 21/56 and 21/27
21/56 + 21/27 is 83/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 27 is 1512
Next, find the equivalent fraction of both fractional numbers with denominator 1512 - For the 1st fraction, since 56 × 27 = 1512,
21/56 = 21 × 27/56 × 27 = 567/1512 - Likewise, for the 2nd fraction, since 27 × 56 = 1512,
21/27 = 21 × 56/27 × 56 = 1176/1512 - Add the two like fractions:
567/1512 + 1176/1512 = 567 + 1176/1512 = 1743/1512 - 1743/1512 simplified gives 83/72
- So, 21/56 + 21/27 = 83/72
In mixed form: 111/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+21/27 21/56+42/27 21/56+21/54 63/56+21/27 21/56+63/27 21/56+21/81