Subtract 3/36 from 6/81
6/81 - 3/36 is -1/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 36 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
6/81 = 6 × 4/81 × 4 = 24/324 - Likewise, for the 2nd fraction, since 36 × 9 = 324,
3/36 = 3 × 9/36 × 9 = 27/324 - Subtract the two like fractions:
24/324 - 27/324 = 24 - 27/324 = -3/324 - After reducing the fraction, the answer is -1/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/81-3/36 6/81-6/36 6/81-3/72 18/81-3/36 6/81-9/36 30/81-3/36 6/81-15/36 42/81-3/36 6/81-21/36