Subtract 8/42 from 4/27
4/27 - 8/42 is -8/189.
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,
4/27 = 4 × 14/27 × 14 = 56/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
8/42 = 8 × 9/42 × 9 = 72/378 - Subtract the two like fractions:
56/378 - 72/378 = 56 - 72/378 = -16/378 - After reducing the fraction, the answer is -8/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/27-8/42 4/27-16/42 4/54-8/42 4/27-8/84 12/27-8/42 4/27-24/42 4/81-8/42 20/27-8/42 4/27-40/42 28/27-8/42 4/27-56/42