Subtract 49/54 from 6/21
6/21 - 49/54 is -235/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
6/21 = 6 × 18/21 × 18 = 108/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
49/54 = 49 × 7/54 × 7 = 343/378 - Subtract the two like fractions:
108/378 - 343/378 = 108 - 343/378 = -235/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-49/54 6/21-98/54 6/42-49/54 18/21-49/54 6/63-49/54 30/21-49/54 42/21-49/54