Add 2/12 and 9/21
2/12 + 9/21 is 25/42.
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,
2/12 = 2 × 7/12 × 7 = 14/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Add the two like fractions:
14/84 + 36/84 = 14 + 36/84 = 50/84 - 50/84 simplified gives 25/42
- So, 2/12 + 9/21 = 25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/12+9/21 2/12+18/21 2/24+9/21 2/12+9/42 6/12+9/21 2/12+27/21 2/36+9/21 2/12+9/63 10/12+9/21 2/12+45/21 2/60+9/21 14/12+9/21 2/12+63/21 2/84+9/21