Add 7/18 and 21/7
1st number: 7/18, 2nd number: 3 0/7
7/18 + 21/7 is 61/18.
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,
7/18 = 7 × 7/18 × 7 = 49/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Add the two like fractions:
49/126 + 378/126 = 49 + 378/126 = 427/126 - 427/126 simplified gives 61/18
- So, 7/18 + 21/7 = 61/18
In mixed form: 37/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18+21/7 7/18+42/7 7/36+21/7 7/18+21/14 21/18+21/7 7/18+63/7 7/54+21/7 35/18+21/7 7/90+21/7 7/18+21/35 49/18+21/7 7/18+21/49