Add 21/12 and 36/4
1st number: 1 9/12, 2nd number: 9 0/4
21/12 + 36/4 is 43/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
36/4 = 36 × 3/4 × 3 = 108/12 - Add the two like fractions:
21/12 + 108/12 = 21 + 108/12 = 129/12 - 129/12 simplified gives 43/4
- So, 21/12 + 36/4 = 43/4
In mixed form: 103/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+36/4 21/12+72/4 21/24+36/4 21/12+36/8 63/12+36/4 21/36+36/4 21/12+36/12 21/60+36/4 21/12+36/20 21/84+36/4 21/12+36/28