Add 12/24 and 21/27
12/24 + 21/27 is 23/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 24 × 9 = 216,
12/24 = 12 × 9/24 × 9 = 108/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Add the two like fractions:
108/216 + 168/216 = 108 + 168/216 = 276/216 - 276/216 simplified gives 23/18
- So, 12/24 + 21/27 = 23/18
In mixed form: 15/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/24+42/27 12/48+21/27 12/24+21/54 36/24+21/27 12/24+63/27 12/72+21/27 12/24+21/81 60/24+21/27 84/24+21/27