Subtract 8/6 from 3/21
1st number: 3/21, 2nd number: 1 2/6
3/21 - 8/6 is -25/21.
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,
3/21 = 3 × 2/21 × 2 = 6/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
8/6 = 8 × 7/6 × 7 = 56/42 - Subtract the two like fractions:
6/42 - 56/42 = 6 - 56/42 = -50/42 - After reducing the fraction, the answer is -25/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21-8/6 3/21-16/6 3/42-8/6 3/21-8/12 9/21-8/6 3/21-24/6 3/63-8/6 3/21-8/18 15/21-8/6 3/21-40/6 3/21-8/30 3/21-56/6 3/21-8/42