Add 27/21 and 84/18
1st number: 1 6/21, 2nd number: 4 12/18
27/21 + 84/18 is 125/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
27/21 = 27 × 6/21 × 6 = 162/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Add the two like fractions:
162/126 + 588/126 = 162 + 588/126 = 750/126 - 750/126 simplified gives 125/21
- So, 27/21 + 84/18 = 125/21
In mixed form: 520/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+84/18 27/42+84/18 27/21+84/36 81/21+84/18 27/63+84/18 27/21+84/54 27/21+84/90