Subtract 16/81 from 1/9
1/9 - 16/81 is -7/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
1/9 = 1 × 9/9 × 9 = 9/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
16/81 = 16 × 1/81 × 1 = 16/81 - Subtract the two like fractions:
9/81 - 16/81 = 9 - 16/81 = -7/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/9-16/81 1/9-32/81 1/18-16/81 3/9-16/81 1/9-48/81 1/27-16/81 5/9-16/81 1/9-80/81 1/45-16/81 7/9-16/81 1/63-16/81