Subtract 3/9 from 3/81
3/81 - 3/9 is -8/27.
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,
3/81 = 3 × 1/81 × 1 = 3/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
3/9 = 3 × 9/9 × 9 = 27/81 - Subtract the two like fractions:
3/81 - 27/81 = 3 - 27/81 = -24/81 - After reducing the fraction, the answer is -8/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/81-3/9 3/81-6/9 3/81-3/18 9/81-3/9 3/81-3/27 15/81-3/9 3/81-15/9 3/81-3/45 21/81-3/9 3/81-21/9 3/81-3/63