Subtract 21/54 from 1/4
1/4 - 21/54 is -5/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 54 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
1/4 = 1 × 27/4 × 27 = 27/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
21/54 = 21 × 2/54 × 2 = 42/108 - Subtract the two like fractions:
27/108 - 42/108 = 27 - 42/108 = -15/108 - After reducing the fraction, the answer is -5/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4-21/54 1/4-42/54 1/8-21/54 3/4-21/54 1/4-63/54 1/12-21/54 5/4-21/54 1/20-21/54 7/4-21/54 1/28-21/54