Subtract 21/54 from 5/2
1st number: 2 1/2, 2nd number: 21/54
5/2 - 21/54 is 19/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
5/2 = 5 × 27/2 × 27 = 135/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
21/54 = 21 × 1/54 × 1 = 21/54 - Subtract the two like fractions:
135/54 - 21/54 = 135 - 21/54 = 114/54 - After reducing the fraction, the answer is 19/9
- In mixed form: 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/2-21/54 5/2-42/54 5/4-21/54 15/2-21/54 5/2-63/54 5/6-21/54 25/2-21/54 5/10-21/54 35/2-21/54 5/14-21/54