Subtract 6/9 from 4/81
4/81 - 6/9 is -50/81.
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,
4/81 = 4 × 1/81 × 1 = 4/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
6/9 = 6 × 9/9 × 9 = 54/81 - Subtract the two like fractions:
4/81 - 54/81 = 4 - 54/81 = -50/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/81-6/9 4/81-12/9 4/81-6/18 12/81-6/9 4/81-18/9 4/81-6/27 20/81-6/9 4/81-30/9 4/81-6/45 28/81-6/9 4/81-42/9 4/81-6/63