Add 3/42 and 9/12
3/42 + 9/12 is 23/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
3/42 = 3 × 2/42 × 2 = 6/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
9/12 = 9 × 7/12 × 7 = 63/84 - Add the two like fractions:
6/84 + 63/84 = 6 + 63/84 = 69/84 - 69/84 simplified gives 23/28
- So, 3/42 + 9/12 = 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+9/12 3/42+18/12 3/84+9/12 3/42+9/24 9/42+9/12 3/42+27/12 3/42+9/36 15/42+9/12 3/42+45/12 3/42+9/60 21/42+9/12 3/42+63/12 3/42+9/84