Add 12/21 and 24/12
1st number: 12/21, 2nd number: 2 0/12
12/21 + 24/12 is 18/7.
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,
12/21 = 12 × 4/21 × 4 = 48/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
24/12 = 24 × 7/12 × 7 = 168/84 - Add the two like fractions:
48/84 + 168/84 = 48 + 168/84 = 216/84 - 216/84 simplified gives 18/7
- So, 12/21 + 24/12 = 18/7
In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+24/12 12/21+48/12 12/42+24/12 36/21+24/12 12/21+72/12 12/63+24/12 12/21+24/36 60/21+24/12 12/21+24/60 84/21+24/12 12/21+24/84