Add 56/12 and 27/21
1st number: 4 8/12, 2nd number: 1 6/21
56/12 + 27/21 is 125/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
56/12 = 56 × 7/12 × 7 = 392/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Add the two like fractions:
392/84 + 108/84 = 392 + 108/84 = 500/84 - 500/84 simplified gives 125/21
- So, 56/12 + 27/21 = 125/21
In mixed form: 520/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+54/21 56/24+27/21 56/12+27/42 56/12+81/21 56/36+27/21 56/12+27/63 56/60+27/21 56/84+27/21