Add 3/18 and 21/54
3/18 + 21/54 is 5/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
3/18 = 3 × 3/18 × 3 = 9/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
21/54 = 21 × 1/54 × 1 = 21/54 - Add the two like fractions:
9/54 + 21/54 = 9 + 21/54 = 30/54 - 30/54 simplified gives 5/9
- So, 3/18 + 21/54 = 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+21/54 3/18+42/54 3/36+21/54 9/18+21/54 3/18+63/54 3/54+21/54 15/18+21/54 3/90+21/54 21/18+21/54