Subtract 21/54 from 5/28
5/28 - 21/54 is -53/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
5/28 = 5 × 27/28 × 27 = 135/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
21/54 = 21 × 14/54 × 14 = 294/756 - Subtract the two like fractions:
135/756 - 294/756 = 135 - 294/756 = -159/756 - After reducing the fraction, the answer is -53/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28-21/54 5/28-42/54 5/56-21/54 15/28-21/54 5/28-63/54 5/84-21/54 25/28-21/54 35/28-21/54