Subtract 28/54 from 21/3
1st number: 7 0/3, 2nd number: 28/54
21/3 - 28/54 is 175/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 3 × 18 = 54,
21/3 = 21 × 18/3 × 18 = 378/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
28/54 = 28 × 1/54 × 1 = 28/54 - Subtract the two like fractions:
378/54 - 28/54 = 378 - 28/54 = 350/54 - After reducing the fraction, the answer is 175/27
- In mixed form: 613/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-28/54 21/3-56/54 21/6-28/54 63/3-28/54 21/3-84/54 21/9-28/54 21/15-28/54