Add 16/21 and 12/8
1st number: 16/21, 2nd number: 1 4/8
16/21 + 12/8 is 95/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
16/21 = 16 × 8/21 × 8 = 128/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
12/8 = 12 × 21/8 × 21 = 252/168 - Add the two like fractions:
128/168 + 252/168 = 128 + 252/168 = 380/168 - 380/168 simplified gives 95/42
- So, 16/21 + 12/8 = 95/42
In mixed form: 211/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+12/8 16/21+24/8 16/42+12/8 16/21+12/16 48/21+12/8 16/21+36/8 16/63+12/8 16/21+12/24 80/21+12/8 16/21+60/8 16/21+12/40 16/21+84/8 16/21+12/56