Subtract 5/6 from 20/42
20/42 - 5/6 is -5/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
5/6 = 5 × 7/6 × 7 = 35/42 - Subtract the two like fractions:
20/42 - 35/42 = 20 - 35/42 = -15/42 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-5/6 20/42-10/6 20/84-5/6 20/42-5/12 60/42-5/6 20/42-15/6 20/42-5/18 20/42-25/6 20/42-5/30 20/42-35/6 20/42-5/42