Subtract 27/4 from 21/6
1st number: 3 3/6, 2nd number: 6 3/4
21/6 - 27/4 is -13/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
27/4 = 27 × 3/4 × 3 = 81/12 - Subtract the two like fractions:
42/12 - 81/12 = 42 - 81/12 = -39/12 - After reducing the fraction, the answer is -13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-27/4 21/6-54/4 21/12-27/4 21/6-27/8 63/6-27/4 21/6-81/4 21/18-27/4 21/6-27/12 21/30-27/4 21/6-27/20 21/42-27/4 21/6-27/28