Subtract 7/27 from 4/42
4/42 - 7/27 is -31/189.
Steps for subtracting 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,
4/42 = 4 × 9/42 × 9 = 36/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
7/27 = 7 × 14/27 × 14 = 98/378 - Subtract the two like fractions:
36/378 - 98/378 = 36 - 98/378 = -62/378 - After reducing the fraction, the answer is -31/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-7/27 4/42-14/27 4/84-7/27 4/42-7/54 12/42-7/27 4/42-21/27 4/42-7/81 20/42-7/27 4/42-35/27 28/42-7/27 4/42-49/27