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