Add 12/6 and 15/21
1st number: 2 0/6, 2nd number: 15/21
12/6 + 15/21 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
12/6 = 12 × 7/6 × 7 = 84/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
15/21 = 15 × 2/21 × 2 = 30/42 - Add the two like fractions:
84/42 + 30/42 = 84 + 30/42 = 114/42 - 114/42 simplified gives 19/7
- So, 12/6 + 15/21 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/6+15/21 12/6+30/21 12/6+15/42 36/6+15/21 12/6+45/21 12/18+15/21 12/6+15/63 60/6+15/21 12/6+75/21 12/30+15/21 84/6+15/21 12/42+15/21