Subtract 5/81 from 4/12
4/12 - 5/81 is 22/81.
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,
4/12 = 4 × 27/12 × 27 = 108/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
5/81 = 5 × 4/81 × 4 = 20/324 - Subtract the two like fractions:
108/324 - 20/324 = 108 - 20/324 = 88/324 - After reducing the fraction, the answer is 22/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12-5/81 4/12-10/81 4/24-5/81 4/12-15/81 4/36-5/81 20/12-5/81 4/12-25/81 4/60-5/81 28/12-5/81 4/12-35/81 4/84-5/81