Subtract 1/4 from 4/81
4/81 - 1/4 is -65/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
4/81 = 4 × 4/81 × 4 = 16/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
1/4 = 1 × 81/4 × 81 = 81/324 - Subtract the two like fractions:
16/324 - 81/324 = 16 - 81/324 = -65/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/81-1/4 4/81-2/4 4/81-1/8 12/81-1/4 4/81-3/4 4/81-1/12 20/81-1/4 4/81-5/4 4/81-1/20 28/81-1/4 4/81-7/4 4/81-1/28