Add 15/21 and 56/24
1st number: 15/21, 2nd number: 2 8/24
15/21 + 56/24 is 64/21.
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,
15/21 = 15 × 8/21 × 8 = 120/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
56/24 = 56 × 7/24 × 7 = 392/168 - Add the two like fractions:
120/168 + 392/168 = 120 + 392/168 = 512/168 - 512/168 simplified gives 64/21
- So, 15/21 + 56/24 = 64/21
In mixed form: 31/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+56/24 15/42+56/24 15/21+56/48 45/21+56/24 15/63+56/24 15/21+56/72 75/21+56/24