Subtract 7/54 from 21/6
1st number: 3 3/6, 2nd number: 7/54
21/6 - 7/54 is 91/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 54 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 54 × 1 = 54,
7/54 = 7 × 1/54 × 1 = 7/54 - Subtract the two like fractions:
189/54 - 7/54 = 189 - 7/54 = 182/54 - After reducing the fraction, the answer is 91/27
- In mixed form: 310/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-7/54 21/6-14/54 21/12-7/54 63/6-7/54 21/6-21/54 21/18-7/54 21/6-35/54 21/30-7/54 21/6-49/54 21/42-7/54