Add 5/12 and 84/21
1st number: 5/12, 2nd number: 4 0/21
5/12 + 84/21 is 53/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
5/12 = 5 × 7/12 × 7 = 35/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
84/21 = 84 × 4/21 × 4 = 336/84 - Add the two like fractions:
35/84 + 336/84 = 35 + 336/84 = 371/84 - 371/84 simplified gives 53/12
- So, 5/12 + 84/21 = 53/12
In mixed form: 45/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/12+84/21 5/24+84/21 5/12+84/42 15/12+84/21 5/36+84/21 5/12+84/63 25/12+84/21 5/60+84/21 35/12+84/21 5/84+84/21