Add 3/18 and 21/7
1st number: 3/18, 2nd number: 3 0/7
3/18 + 21/7 is 19/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Add the two like fractions:
21/126 + 378/126 = 21 + 378/126 = 399/126 - 399/126 simplified gives 19/6
- So, 3/18 + 21/7 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+21/7 3/18+42/7 3/36+21/7 3/18+21/14 9/18+21/7 3/18+63/7 3/54+21/7 15/18+21/7 3/90+21/7 3/18+21/35 21/18+21/7 3/18+21/49