Subtract 5/21 from 4/6
4/6 - 5/21 is 3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
4/6 = 4 × 7/6 × 7 = 28/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
5/21 = 5 × 2/21 × 2 = 10/42 - Subtract the two like fractions:
28/42 - 10/42 = 28 - 10/42 = 18/42 - After reducing the fraction, the answer is 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/6-5/21 4/6-10/21 4/12-5/21 4/6-5/42 12/6-5/21 4/6-15/21 4/18-5/21 4/6-5/63 20/6-5/21 4/6-25/21 4/30-5/21 28/6-5/21 4/6-35/21 4/42-5/21