Subtract 21/6 from 8/4
1st number: 2 0/4, 2nd number: 3 3/6
8/4 - 21/6 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
8/4 = 8 × 3/4 × 3 = 24/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Subtract the two like fractions:
24/12 - 42/12 = 24 - 42/12 = -18/12 - After reducing the fraction, the answer is -3/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4-21/6 8/4-42/6 8/4-21/12 24/4-21/6 8/4-63/6 8/12-21/6 8/4-21/18 40/4-21/6 8/20-21/6 8/4-21/30 56/4-21/6 8/28-21/6 8/4-21/42