Subtract 10/81 from 4/36
4/36 - 10/81 is -1/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
4/36 = 4 × 9/36 × 9 = 36/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
10/81 = 10 × 4/81 × 4 = 40/324 - Subtract the two like fractions:
36/324 - 40/324 = 36 - 40/324 = -4/324 - After reducing the fraction, the answer is -1/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/36-10/81 4/36-20/81 4/72-10/81 12/36-10/81 4/36-30/81 20/36-10/81 4/36-50/81 28/36-10/81 4/36-70/81