Subtract 3/21 from 20/6
1st number: 3 2/6, 2nd number: 3/21
20/6 - 3/21 is 67/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Subtract the two like fractions:
140/42 - 6/42 = 140 - 6/42 = 134/42 - After reducing the fraction, the answer is 67/21
- In mixed form: 34/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6-3/21 20/6-6/21 20/12-3/21 20/6-3/42 60/6-3/21 20/6-9/21 20/18-3/21 20/6-3/63 20/6-15/21 20/30-3/21 20/42-3/21