Subtract 12/42 from 20/6
1st number: 3 2/6, 2nd number: 12/42
20/6 - 12/42 is 64/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 42 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 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Subtract the two like fractions:
140/42 - 12/42 = 140 - 12/42 = 128/42 - After reducing the fraction, the answer is 64/21
- In mixed form: 31/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6-12/42 20/6-24/42 20/12-12/42 20/6-12/84 60/6-12/42 20/6-36/42 20/18-12/42 20/6-60/42 20/30-12/42 20/6-84/42 20/42-12/42