Subtract 12/81 from 8/12
8/12 - 12/81 is 14/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
8/12 = 8 × 27/12 × 27 = 216/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
12/81 = 12 × 4/81 × 4 = 48/324 - Subtract the two like fractions:
216/324 - 48/324 = 216 - 48/324 = 168/324 - After reducing the fraction, the answer is 14/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-12/81 8/12-24/81 8/24-12/81 24/12-12/81 8/12-36/81 8/36-12/81 40/12-12/81 8/12-60/81 8/60-12/81 56/12-12/81 8/12-84/81 8/84-12/81