Subtract 1/6 from 12/81
12/81 - 1/6 is -1/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 6 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
12/81 = 12 × 2/81 × 2 = 24/162 - Likewise, for the 2nd fraction, since 6 × 27 = 162,
1/6 = 1 × 27/6 × 27 = 27/162 - Subtract the two like fractions:
24/162 - 27/162 = 24 - 27/162 = -3/162 - After reducing the fraction, the answer is -1/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81-1/6 12/81-2/6 12/81-1/12 36/81-1/6 12/81-3/6 12/81-1/18 60/81-1/6 12/81-5/6 12/81-1/30 84/81-1/6 12/81-7/6 12/81-1/42