Add 27/3 and 21/42
1st number: 9 0/3, 2nd number: 21/42
27/3 + 21/42 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
27/3 = 27 × 14/3 × 14 = 378/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Add the two like fractions:
378/42 + 21/42 = 378 + 21/42 = 399/42 - 399/42 simplified gives 19/2
- So, 27/3 + 21/42 = 19/2
In mixed form: 91/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/3+21/42 27/6+21/42 27/3+21/84 81/3+21/42 27/3+63/42 27/9+21/42 27/15+21/42 27/21+21/42