Add 27/15 and 9/12
1st number: 1 12/15, 2nd number: 9/12
27/15 + 9/12 is 51/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
27/15 = 27 × 4/15 × 4 = 108/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
9/12 = 9 × 5/12 × 5 = 45/60 - Add the two like fractions:
108/60 + 45/60 = 108 + 45/60 = 153/60 - 153/60 simplified gives 51/20
- So, 27/15 + 9/12 = 51/20
In mixed form: 211/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+9/12 27/15+18/12 27/30+9/12 27/15+9/24 81/15+9/12 27/15+27/12 27/45+9/12 27/15+9/36 27/15+45/12 27/75+9/12 27/15+9/60 27/15+63/12 27/15+9/84