Add 56/21 and 72/56
1st number: 2 14/21, 2nd number: 1 16/56
56/21 + 72/56 is 83/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
56/21 = 56 × 8/21 × 8 = 448/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
72/56 = 72 × 3/56 × 3 = 216/168 - Add the two like fractions:
448/168 + 216/168 = 448 + 216/168 = 664/168 - 664/168 simplified gives 83/21
- So, 56/21 + 72/56 = 83/21
In mixed form: 320/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+72/56 56/63+72/56