Add 21/27 and 27/24
1st number: 21/27, 2nd number: 1 3/24
21/27 + 27/24 is 137/72.
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,
27/24 = 27 × 9/24 × 9 = 243/216 - Add the two like fractions:
168/216 + 243/216 = 168 + 243/216 = 411/216 - 411/216 simplified gives 137/72
- So, 21/27 + 27/24 = 137/72
In mixed form: 165/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+27/24 21/27+54/24 21/54+27/24 21/27+27/48 63/27+27/24 21/27+81/24 21/81+27/24 21/27+27/72