Add 21/14 and 3/18
1st number: 1 7/14, 2nd number: 3/18
21/14 + 3/18 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Add the two like fractions:
189/126 + 21/126 = 189 + 21/126 = 210/126 - 210/126 simplified gives 5/3
- So, 21/14 + 3/18 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+3/18 21/14+6/18 21/28+3/18 21/14+3/36 63/14+3/18 21/14+9/18 21/42+3/18 21/14+3/54 21/14+15/18 21/70+3/18 21/14+3/90 21/14+21/18 21/98+3/18