Add 27/15 and 21/30
1st number: 1 12/15, 2nd number: 21/30
27/15 + 21/30 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
27/15 = 27 × 2/15 × 2 = 54/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Add the two like fractions:
54/30 + 21/30 = 54 + 21/30 = 75/30 - 75/30 simplified gives 5/2
- So, 27/15 + 21/30 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+21/30 27/15+42/30 27/30+21/30 27/15+21/60 81/15+21/30 27/15+63/30 27/45+21/30 27/15+21/90 27/75+21/30