Add 12/15 and 21/24
12/15 + 21/24 is 67/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
12/15 = 12 × 8/15 × 8 = 96/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Add the two like fractions:
96/120 + 105/120 = 96 + 105/120 = 201/120 - 201/120 simplified gives 67/40
- So, 12/15 + 21/24 = 67/40
In mixed form: 127/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+21/24 12/15+42/24 12/30+21/24 12/15+21/48 36/15+21/24 12/15+63/24 12/45+21/24 12/15+21/72 60/15+21/24 12/75+21/24 84/15+21/24