Subtract 1/21 from 49/54
49/54 - 1/21 is 325/378.
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,
49/54 = 49 × 7/54 × 7 = 343/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
1/21 = 1 × 18/21 × 18 = 18/378 - Subtract the two like fractions:
343/378 - 18/378 = 343 - 18/378 = 325/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/54-1/21 49/54-2/21 49/54-1/42 49/54-3/21 49/54-1/63 49/54-5/21 49/54-7/21