Subtract 2/21 from 2/6
2/6 - 2/21 is 5/21.
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,
2/6 = 2 × 7/6 × 7 = 14/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
2/21 = 2 × 2/21 × 2 = 4/42 - Subtract the two like fractions:
14/42 - 4/42 = 14 - 4/42 = 10/42 - After reducing the fraction, the answer is 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/6-2/21 2/6-4/21 2/12-2/21 2/6-2/42 2/6-6/21 2/18-2/21 2/6-2/63 10/6-2/21 2/6-10/21 2/30-2/21 14/6-2/21 2/6-14/21 2/42-2/21