Add 12/14 and 27/21
1st number: 12/14, 2nd number: 1 6/21
12/14 + 27/21 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
12/14 = 12 × 3/14 × 3 = 36/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
27/21 = 27 × 2/21 × 2 = 54/42 - Add the two like fractions:
36/42 + 54/42 = 36 + 54/42 = 90/42 - 90/42 simplified gives 15/7
- So, 12/14 + 27/21 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/14+27/21 12/14+54/21 12/28+27/21 12/14+27/42 36/14+27/21 12/14+81/21 12/42+27/21 12/14+27/63 60/14+27/21 12/70+27/21 84/14+27/21 12/98+27/21