Add 27/42 and 2/12
27/42 + 2/12 is 17/21.
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,
27/42 = 27 × 2/42 × 2 = 54/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
2/12 = 2 × 7/12 × 7 = 14/84 - Add the two like fractions:
54/84 + 14/84 = 54 + 14/84 = 68/84 - 68/84 simplified gives 17/21
- So, 27/42 + 2/12 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+2/12 27/42+4/12 27/84+2/12 27/42+2/24 81/42+2/12 27/42+6/12 27/42+2/36 27/42+10/12 27/42+2/60 27/42+14/12 27/42+2/84