Subtract 6/9 from 5/81
5/81 - 6/9 is -49/81.
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,
5/81 = 5 × 1/81 × 1 = 5/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
6/9 = 6 × 9/9 × 9 = 54/81 - Subtract the two like fractions:
5/81 - 54/81 = 5 - 54/81 = -49/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/81-6/9 5/81-12/9 5/81-6/18 15/81-6/9 5/81-18/9 5/81-6/27 25/81-6/9 5/81-30/9 5/81-6/45 35/81-6/9 5/81-42/9 5/81-6/63