Add 12/42 and 15/27
12/42 + 15/27 is 53/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
12/42 = 12 × 9/42 × 9 = 108/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
15/27 = 15 × 14/27 × 14 = 210/378 - Add the two like fractions:
108/378 + 210/378 = 108 + 210/378 = 318/378 - 318/378 simplified gives 53/63
- So, 12/42 + 15/27 = 53/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+15/27 12/42+30/27 12/84+15/27 12/42+15/54 36/42+15/27 12/42+45/27 12/42+15/81 60/42+15/27 12/42+75/27 84/42+15/27