Add 8/12 and 21/36
8/12 + 21/36 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
8/12 = 8 × 3/12 × 3 = 24/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
21/36 = 21 × 1/36 × 1 = 21/36 - Add the two like fractions:
24/36 + 21/36 = 24 + 21/36 = 45/36 - 45/36 simplified gives 5/4
- So, 8/12 + 21/36 = 5/4
In mixed form: 11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12+21/36 8/12+42/36 8/24+21/36 8/12+21/72 24/12+21/36 8/12+63/36 8/36+21/36 40/12+21/36 8/60+21/36 56/12+21/36 8/84+21/36