Add 12/27 and 9/42
12/27 + 9/42 is 83/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
12/27 = 12 × 14/27 × 14 = 168/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
9/42 = 9 × 9/42 × 9 = 81/378 - Add the two like fractions:
168/378 + 81/378 = 168 + 81/378 = 249/378 - 249/378 simplified gives 83/126
- So, 12/27 + 9/42 = 83/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+9/42 12/27+18/42 12/54+9/42 12/27+9/84 36/27+9/42 12/27+27/42 12/81+9/42 60/27+9/42 12/27+45/42 84/27+9/42 12/27+63/42