Subtract 5/6 from 10/21
10/21 - 5/6 is -5/14.
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,
10/21 = 10 × 2/21 × 2 = 20/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
5/6 = 5 × 7/6 × 7 = 35/42 - Subtract the two like fractions:
20/42 - 35/42 = 20 - 35/42 = -15/42 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-5/6 10/21-10/6 10/42-5/6 10/21-5/12 30/21-5/6 10/21-15/6 10/63-5/6 10/21-5/18 50/21-5/6 10/21-25/6 10/21-5/30 70/21-5/6 10/21-35/6 10/21-5/42