Add 21/12 and 36/24
1st number: 1 9/12, 2nd number: 1 12/24
21/12 + 36/24 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 24 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Likewise, for the 2nd fraction, since 24 × 1 = 24,
36/24 = 36 × 1/24 × 1 = 36/24 - Add the two like fractions:
42/24 + 36/24 = 42 + 36/24 = 78/24 - 78/24 simplified gives 13/4
- So, 21/12 + 36/24 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+36/24 21/12+72/24 21/24+36/24 21/12+36/48 63/12+36/24 21/36+36/24 21/12+36/72 21/60+36/24 21/84+36/24