Add 42/21 and 6/27
1st number: 2 0/21, 2nd number: 6/27
42/21 + 6/27 is 20/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
42/21 = 42 × 9/21 × 9 = 378/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
6/27 = 6 × 7/27 × 7 = 42/189 - Add the two like fractions:
378/189 + 42/189 = 378 + 42/189 = 420/189 - 420/189 simplified gives 20/9
- So, 42/21 + 6/27 = 20/9
In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+6/27 42/21+12/27 42/21+6/54 42/21+18/27 42/63+6/27 42/21+6/81 42/21+30/27 42/21+42/27