Add 56/28 and 21/42
1st number: 2 0/28, 2nd number: 21/42
56/28 + 21/42 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
56/28 = 56 × 3/28 × 3 = 168/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
21/42 = 21 × 2/42 × 2 = 42/84 - Add the two like fractions:
168/84 + 42/84 = 168 + 42/84 = 210/84 - 210/84 simplified gives 5/2
- So, 56/28 + 21/42 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/28+21/84 56/28+63/42 56/84+21/42