Add 12/21 and 14/8
1st number: 12/21, 2nd number: 1 6/8
12/21 + 14/8 is 65/28.
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,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
14/8 = 14 × 21/8 × 21 = 294/168 - Add the two like fractions:
96/168 + 294/168 = 96 + 294/168 = 390/168 - 390/168 simplified gives 65/28
- So, 12/21 + 14/8 = 65/28
In mixed form: 29/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+14/8 12/21+28/8 12/42+14/8 12/21+14/16 36/21+14/8 12/21+42/8 12/63+14/8 12/21+14/24 60/21+14/8 12/21+70/8 12/21+14/40 84/21+14/8 12/21+98/8 12/21+14/56