Add 27/18 and 6/21
1st number: 1 9/18, 2nd number: 6/21
27/18 + 6/21 is 25/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
27/18 = 27 × 7/18 × 7 = 189/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
6/21 = 6 × 6/21 × 6 = 36/126 - Add the two like fractions:
189/126 + 36/126 = 189 + 36/126 = 225/126 - 225/126 simplified gives 25/14
- So, 27/18 + 6/21 = 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: 54/18+6/21 27/18+12/21 27/36+6/21 27/18+6/42 81/18+6/21 27/18+18/21 27/54+6/21 27/18+6/63 27/18+30/21 27/90+6/21 27/18+42/21