Add 21/24 and 3/18
21/24 + 3/18 is 25/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
21/24 = 21 × 3/24 × 3 = 63/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
3/18 = 3 × 4/18 × 4 = 12/72 - Add the two like fractions:
63/72 + 12/72 = 63 + 12/72 = 75/72 - 75/72 simplified gives 25/24
- So, 21/24 + 3/18 = 25/24
In mixed form: 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+3/18 21/24+6/18 21/48+3/18 21/24+3/36 63/24+3/18 21/24+9/18 21/72+3/18 21/24+3/54 21/24+15/18 21/24+3/90 21/24+21/18