Subtract 28/27 from 21/6
1st number: 3 3/6, 2nd number: 1 1/27
21/6 - 28/27 is 133/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 6 × 9 = 54,
21/6 = 21 × 9/6 × 9 = 189/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
28/27 = 28 × 2/27 × 2 = 56/54 - Subtract the two like fractions:
189/54 - 56/54 = 189 - 56/54 = 133/54 - In mixed form: 225/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-28/27 21/6-56/27 21/12-28/27 21/6-28/54 63/6-28/27 21/6-84/27 21/18-28/27 21/6-28/81 21/30-28/27 21/42-28/27