Add 12/21 and 15/24
12/21 + 15/24 is 67/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
15/24 = 15 × 7/24 × 7 = 105/168 - Add the two like fractions:
96/168 + 105/168 = 96 + 105/168 = 201/168 - 201/168 simplified gives 67/56
- So, 12/21 + 15/24 = 67/56
In mixed form: 111/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+15/24 12/21+30/24 12/42+15/24 12/21+15/48 36/21+15/24 12/21+45/24 12/63+15/24 12/21+15/72 60/21+15/24 12/21+75/24 84/21+15/24