Add 16/21 and 8/12
16/21 + 8/12 is 10/7.
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,
16/21 = 16 × 4/21 × 4 = 64/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
8/12 = 8 × 7/12 × 7 = 56/84 - Add the two like fractions:
64/84 + 56/84 = 64 + 56/84 = 120/84 - 120/84 simplified gives 10/7
- So, 16/21 + 8/12 = 10/7
In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+8/12 16/21+16/12 16/42+8/12 16/21+8/24 48/21+8/12 16/21+24/12 16/63+8/12 16/21+8/36 80/21+8/12 16/21+40/12 16/21+8/60 16/21+56/12 16/21+8/84