Subtract 5/21 from 6/54
6/54 - 5/21 is -8/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
6/54 = 6 × 7/54 × 7 = 42/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
5/21 = 5 × 18/21 × 18 = 90/378 - Subtract the two like fractions:
42/378 - 90/378 = 42 - 90/378 = -48/378 - After reducing the fraction, the answer is -8/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/54-5/21 6/54-10/21 6/54-5/42 18/54-5/21 6/54-15/21 6/54-5/63 30/54-5/21 6/54-25/21 42/54-5/21 6/54-35/21