Subtract 45/54 from 21/4
1st number: 5 1/4, 2nd number: 45/54
21/4 - 45/54 is 53/12.
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,
21/4 = 21 × 27/4 × 27 = 567/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
45/54 = 45 × 2/54 × 2 = 90/108 - Subtract the two like fractions:
567/108 - 90/108 = 567 - 90/108 = 477/108 - After reducing the fraction, the answer is 53/12
- In mixed form: 45/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-45/54 21/4-90/54 21/8-45/54 63/4-45/54 21/12-45/54 21/20-45/54 21/28-45/54