Subtract 9/81 from 1/4
1/4 - 9/81 is 5/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
1/4 = 1 × 81/4 × 81 = 81/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
9/81 = 9 × 4/81 × 4 = 36/324 - Subtract the two like fractions:
81/324 - 36/324 = 81 - 36/324 = 45/324 - After reducing the fraction, the answer is 5/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4-9/81 1/4-18/81 1/8-9/81 3/4-9/81 1/4-27/81 1/12-9/81 5/4-9/81 1/4-45/81 1/20-9/81 7/4-9/81 1/4-63/81 1/28-9/81