Subtract 6/42 from 7/54
7/54 - 6/42 is -5/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
7/54 = 7 × 7/54 × 7 = 49/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
6/42 = 6 × 9/42 × 9 = 54/378 - Subtract the two like fractions:
49/378 - 54/378 = 49 - 54/378 = -5/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/54-6/42 7/54-12/42 7/54-6/84 21/54-6/42 7/54-18/42 35/54-6/42 7/54-30/42 49/54-6/42