Add 6/12 and 4/21
6/12 + 4/21 is 29/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
6/12 = 6 × 7/12 × 7 = 42/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Add the two like fractions:
42/84 + 16/84 = 42 + 16/84 = 58/84 - 58/84 simplified gives 29/42
- So, 6/12 + 4/21 = 29/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+8/21 6/24+4/21 6/12+4/42 18/12+4/21 6/12+12/21 6/36+4/21 6/12+4/63 30/12+4/21 6/12+20/21 6/60+4/21 42/12+4/21 6/12+28/21 6/84+4/21