Subtract 4/6 from 4/21
4/21 - 4/6 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
4/21 = 4 × 2/21 × 2 = 8/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
4/6 = 4 × 7/6 × 7 = 28/42 - Subtract the two like fractions:
8/42 - 28/42 = 8 - 28/42 = -20/42 - After reducing the fraction, the answer is -10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-4/6 4/21-8/6 4/42-4/6 4/21-4/12 12/21-4/6 4/21-12/6 4/63-4/6 4/21-4/18 20/21-4/6 4/21-20/6 4/21-4/30 28/21-4/6 4/21-28/6 4/21-4/42