Add 5/21 and 36/12
1st number: 5/21, 2nd number: 3 0/12
5/21 + 36/12 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
36/12 = 36 × 7/12 × 7 = 252/84 - Add the two like fractions:
20/84 + 252/84 = 20 + 252/84 = 272/84 - 272/84 simplified gives 68/21
- So, 5/21 + 36/12 = 68/21
In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+36/12 5/21+72/12 5/42+36/12 5/21+36/24 15/21+36/12 5/63+36/12 25/21+36/12 5/21+36/60 35/21+36/12 5/21+36/84