Subtract 8/5 from 21/6
1st number: 3 3/6, 2nd number: 1 3/5
21/6 - 8/5 is 19/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 5 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Likewise, for the 2nd fraction, since 5 × 6 = 30,
8/5 = 8 × 6/5 × 6 = 48/30 - Subtract the two like fractions:
105/30 - 48/30 = 105 - 48/30 = 57/30 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-8/5 21/6-16/5 21/12-8/5 21/6-8/10 63/6-8/5 21/6-24/5 21/18-8/5 21/6-8/15 21/6-40/5 21/30-8/5 21/6-8/25 21/6-56/5 21/42-8/5 21/6-8/35