Subtract 2/27 from 7/42
7/42 - 2/27 is 5/54.
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,
7/42 = 7 × 9/42 × 9 = 63/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
2/27 = 2 × 14/27 × 14 = 28/378 - Subtract the two like fractions:
63/378 - 28/378 = 63 - 28/378 = 35/378 - After reducing the fraction, the answer is 5/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-2/27 7/42-4/27 7/84-2/27 7/42-2/54 21/42-2/27 7/42-6/27 7/42-2/81 35/42-2/27 7/42-10/27 49/42-2/27 7/42-14/27