Add 54/18 and 21/7
1st number: 3 0/18, 2nd number: 3 0/7
54/18 + 21/7 is 6/1.
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,
54/18 = 54 × 7/18 × 7 = 378/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
21/7 = 21 × 18/7 × 18 = 378/126 - Add the two like fractions:
378/126 + 378/126 = 378 + 378/126 = 756/126 - 756/126 simplified gives 6/1
- So, 54/18 + 21/7 = 6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18+42/7 54/36+21/7 54/18+21/14 54/18+63/7 54/90+21/7 54/18+21/35 54/18+21/49