Subtract 9/81 from 1/54
1/54 - 9/81 is -5/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
1/54 = 1 × 3/54 × 3 = 3/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
9/81 = 9 × 2/81 × 2 = 18/162 - Subtract the two like fractions:
3/162 - 18/162 = 3 - 18/162 = -15/162 - After reducing the fraction, the answer is -5/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/54-9/81 1/54-18/81 3/54-9/81 1/54-27/81 5/54-9/81 1/54-45/81 7/54-9/81 1/54-63/81