Add 27/21 and 9/42
1st number: 1 6/21, 2nd number: 9/42
27/21 + 9/42 is 3/2.
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,
9/42 = 9 × 1/42 × 1 = 9/42 - Add the two like fractions:
54/42 + 9/42 = 54 + 9/42 = 63/42 - 63/42 simplified gives 3/2
- So, 27/21 + 9/42 = 3/2
In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+9/42 27/21+18/42 27/42+9/42 27/21+9/84 81/21+9/42 27/21+27/42 27/63+9/42 27/21+45/42 27/21+63/42