Add 24/21 and 84/12
1st number: 1 3/21, 2nd number: 7 0/12
24/21 + 84/12 is 57/7.
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,
24/21 = 24 × 4/21 × 4 = 96/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
84/12 = 84 × 7/12 × 7 = 588/84 - Add the two like fractions:
96/84 + 588/84 = 96 + 588/84 = 684/84 - 684/84 simplified gives 57/7
- So, 24/21 + 84/12 = 57/7
In mixed form: 81/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+84/12 24/42+84/12 24/21+84/24 72/21+84/12 24/63+84/12 24/21+84/36 24/21+84/60