Subtract 4/14 from 7/21
7/21 - 4/14 is 1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
7/21 = 7 × 2/21 × 2 = 14/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
4/14 = 4 × 3/14 × 3 = 12/42 - Subtract the two like fractions:
14/42 - 12/42 = 14 - 12/42 = 2/42 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-4/14 7/21-8/14 7/42-4/14 7/21-4/28 7/21-12/14 7/63-4/14 7/21-4/42 35/21-4/14 7/21-20/14 7/21-4/70 49/21-4/14 7/21-28/14 7/21-4/98