Subtract 10/14 from 5/21
5/21 - 10/14 is -10/21.
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,
5/21 = 5 × 2/21 × 2 = 10/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
10/14 = 10 × 3/14 × 3 = 30/42 - Subtract the two like fractions:
10/42 - 30/42 = 10 - 30/42 = -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: 10/21-10/14 5/21-20/14 5/42-10/14 5/21-10/28 15/21-10/14 5/21-30/14 5/63-10/14 5/21-10/42 25/21-10/14 5/21-50/14 5/21-10/70 35/21-10/14 5/21-70/14 5/21-10/98