Add 12/8 and 6/21
1st number: 1 4/8, 2nd number: 6/21
12/8 + 6/21 is 25/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
12/8 = 12 × 21/8 × 21 = 252/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
6/21 = 6 × 8/21 × 8 = 48/168 - Add the two like fractions:
252/168 + 48/168 = 252 + 48/168 = 300/168 - 300/168 simplified gives 25/14
- So, 12/8 + 6/21 = 25/14
In mixed form: 111/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/8+6/21 12/8+12/21 12/16+6/21 12/8+6/42 36/8+6/21 12/8+18/21 12/24+6/21 12/8+6/63 60/8+6/21 12/8+30/21 12/40+6/21 84/8+6/21 12/8+42/21 12/56+6/21