Add 5/21 and 16/12
1st number: 5/21, 2nd number: 1 4/12
5/21 + 16/12 is 11/7.
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,
5/21 = 5 × 4/21 × 4 = 20/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
16/12 = 16 × 7/12 × 7 = 112/84 - Add the two like fractions:
20/84 + 112/84 = 20 + 112/84 = 132/84 - 132/84 simplified gives 11/7
- So, 5/21 + 16/12 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+16/12 5/21+32/12 5/42+16/12 5/21+16/24 15/21+16/12 5/21+48/12 5/63+16/12 5/21+16/36 25/21+16/12 5/21+80/12 5/21+16/60 35/21+16/12 5/21+16/84