Add 21/54 and 14/36
21/54 + 14/36 is 7/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 36 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
21/54 = 21 × 2/54 × 2 = 42/108 - Likewise, for the 2nd fraction, since 36 × 3 = 108,
14/36 = 14 × 3/36 × 3 = 42/108 - Add the two like fractions:
42/108 + 42/108 = 42 + 42/108 = 84/108 - 84/108 simplified gives 7/9
- So, 21/54 + 14/36 = 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54+14/36 21/54+28/36 21/54+14/72 63/54+14/36 21/54+42/36 21/54+70/36 21/54+98/36