Subtract 15/42 from 2/27
2/27 - 15/42 is -107/378.
Steps for subtracting 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,
2/27 = 2 × 14/27 × 14 = 28/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
15/42 = 15 × 9/42 × 9 = 135/378 - Subtract the two like fractions:
28/378 - 135/378 = 28 - 135/378 = -107/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/27-15/42 2/27-30/42 2/54-15/42 2/27-15/84 6/27-15/42 2/27-45/42 2/81-15/42 10/27-15/42 2/27-75/42 14/27-15/42