Add 27/56 and 70/21
1st number: 27/56, 2nd number: 3 7/21
27/56 + 70/21 is 641/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
27/56 = 27 × 3/56 × 3 = 81/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
70/21 = 70 × 8/21 × 8 = 560/168 - Add the two like fractions:
81/168 + 560/168 = 81 + 560/168 = 641/168 - So, 27/56 + 70/21 = 641/168
In mixed form: 3137/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/56+70/21 27/56+70/42 81/56+70/21 27/56+70/63