Add 27/12 and 35/21
1st number: 2 3/12, 2nd number: 1 14/21
27/12 + 35/21 is 47/12.
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,
27/12 = 27 × 7/12 × 7 = 189/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
35/21 = 35 × 4/21 × 4 = 140/84 - Add the two like fractions:
189/84 + 140/84 = 189 + 140/84 = 329/84 - 329/84 simplified gives 47/12
- So, 27/12 + 35/21 = 47/12
In mixed form: 311/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12+35/21 27/12+70/21 27/24+35/21 27/12+35/42 81/12+35/21 27/36+35/21 27/12+35/63 27/60+35/21 27/84+35/21