Add 21/27 and 18/24
21/27 + 18/24 is 55/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 24 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Likewise, for the 2nd fraction, since 24 × 9 = 216,
18/24 = 18 × 9/24 × 9 = 162/216 - Add the two like fractions:
168/216 + 162/216 = 168 + 162/216 = 330/216 - 330/216 simplified gives 55/36
- So, 21/27 + 18/24 = 55/36
In mixed form: 119/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+18/24 21/27+36/24 21/54+18/24 21/27+18/48 63/27+18/24 21/27+54/24 21/81+18/24 21/27+18/72 21/27+90/24