Add 4/21 and 56/12
1st number: 4/21, 2nd number: 4 8/12
4/21 + 56/12 is 34/7.
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,
4/21 = 4 × 4/21 × 4 = 16/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
56/12 = 56 × 7/12 × 7 = 392/84 - Add the two like fractions:
16/84 + 392/84 = 16 + 392/84 = 408/84 - 408/84 simplified gives 34/7
- So, 4/21 + 56/12 = 34/7
In mixed form: 46/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+56/12 4/42+56/12 4/21+56/24 12/21+56/12 4/63+56/12 4/21+56/36 20/21+56/12 4/21+56/60 28/21+56/12 4/21+56/84