Add 21/54 and 14/18
21/54 + 14/18 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 18 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
21/54 = 21 × 1/54 × 1 = 21/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
14/18 = 14 × 3/18 × 3 = 42/54 - Add the two like fractions:
21/54 + 42/54 = 21 + 42/54 = 63/54 - 63/54 simplified gives 7/6
- So, 21/54 + 14/18 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+14/18 21/54+28/18 21/54+14/36 63/54+14/18 21/54+42/18 21/54+14/54 21/54+70/18 21/54+14/90 21/54+98/18