Add 3/54 and 21/7
1st number: 3/54, 2nd number: 3 0/7
3/54 + 21/7 is 55/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
3/54 = 3 × 7/54 × 7 = 21/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
21/7 = 21 × 54/7 × 54 = 1134/378 - Add the two like fractions:
21/378 + 1134/378 = 21 + 1134/378 = 1155/378 - 1155/378 simplified gives 55/18
- So, 3/54 + 21/7 = 55/18
In mixed form: 31/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/54+21/7 3/54+42/7 3/54+21/14 9/54+21/7 3/54+63/7 15/54+21/7 3/54+21/35 21/54+21/7 3/54+21/49