Add 21/18 and 27/24
1st number: 1 3/18, 2nd number: 1 3/24
21/18 + 27/24 is 55/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
27/24 = 27 × 3/24 × 3 = 81/72 - Add the two like fractions:
84/72 + 81/72 = 84 + 81/72 = 165/72 - 165/72 simplified gives 55/24
- So, 21/18 + 27/24 = 55/24
In mixed form: 27/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+27/24 21/18+54/24 21/36+27/24 21/18+27/48 63/18+27/24 21/18+81/24 21/54+27/24 21/18+27/72 21/90+27/24