Subtract 28/81 from 1/6
1/6 - 28/81 is -29/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 6 × 27 = 162,
1/6 = 1 × 27/6 × 27 = 27/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
28/81 = 28 × 2/81 × 2 = 56/162 - Subtract the two like fractions:
27/162 - 56/162 = 27 - 56/162 = -29/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/6-28/81 1/6-56/81 1/12-28/81 3/6-28/81 1/6-84/81 1/18-28/81 5/6-28/81 1/30-28/81 7/6-28/81 1/42-28/81