Add 12/42 and 4/12
12/42 + 4/12 is 13/21.
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,
12/42 = 12 × 2/42 × 2 = 24/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
4/12 = 4 × 7/12 × 7 = 28/84 - Add the two like fractions:
24/84 + 28/84 = 24 + 28/84 = 52/84 - 52/84 simplified gives 13/21
- So, 12/42 + 4/12 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+4/12 12/42+8/12 12/84+4/12 12/42+4/24 36/42+4/12 12/42+4/36 60/42+4/12 12/42+20/12 12/42+4/60 84/42+4/12 12/42+28/12 12/42+4/84