Add 21/24 and 15/36
21/24 + 15/36 is 31/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 36 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 36 × 2 = 72,
15/36 = 15 × 2/36 × 2 = 30/72 - Add the two like fractions:
63/72 + 30/72 = 63 + 30/72 = 93/72 - 93/72 simplified gives 31/24
- So, 21/24 + 15/36 = 31/24
In mixed form: 17/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+15/36 21/24+30/36 21/48+15/36 21/24+15/72 63/24+15/36 21/24+45/36 21/72+15/36 21/24+75/36