Add 27/21 and 21/42
1st number: 1 6/21, 2nd number: 21/42
27/21 + 21/42 is 25/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
27/21 = 27 × 2/21 × 2 = 54/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Add the two like fractions:
54/42 + 21/42 = 54 + 21/42 = 75/42 - 75/42 simplified gives 25/14
- So, 27/21 + 21/42 = 25/14
In mixed form: 111/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+21/42 27/42+21/42 27/21+21/84 81/21+21/42 27/21+63/42 27/63+21/42