Add 21/7 and 6/18
1st number: 3 0/7, 2nd number: 6/18
21/7 + 6/18 is 10/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
6/18 = 6 × 7/18 × 7 = 42/126 - Add the two like fractions:
378/126 + 42/126 = 378 + 42/126 = 420/126 - 420/126 simplified gives 10/3
- So, 21/7 + 6/18 = 10/3
In mixed form: 31/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+6/18 21/7+12/18 21/14+6/18 21/7+6/36 63/7+6/18 21/7+6/54 21/7+30/18 21/35+6/18 21/7+6/90 21/7+42/18 21/49+6/18