Add 21/42 and 27/3
1st number: 21/42, 2nd number: 9 0/3
21/42 + 27/3 is 19/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
27/3 = 27 × 14/3 × 14 = 378/42 - Add the two like fractions:
21/42 + 378/42 = 21 + 378/42 = 399/42 - 399/42 simplified gives 19/2
- So, 21/42 + 27/3 = 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: 21/42+54/3 21/84+27/3 21/42+27/6 63/42+27/3 21/42+81/3 21/42+27/9 21/42+27/15 21/42+27/21