Subtract 3/42 from 20/6
1st number: 3 2/6, 2nd number: 3/42
20/6 - 3/42 is 137/42.
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,
3/42 = 3 × 1/42 × 1 = 3/42 - Subtract the two like fractions:
140/42 - 3/42 = 140 - 3/42 = 137/42 - In mixed form: 311/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6-3/42 20/6-6/42 20/12-3/42 20/6-3/84 60/6-3/42 20/6-9/42 20/18-3/42 20/6-15/42 20/30-3/42 20/6-21/42 20/42-3/42