Subtract 84/81 from 8/9
1st number: 8/9, 2nd number: 1 3/81
8/9 - 84/81 is -4/27.
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,
8/9 = 8 × 9/9 × 9 = 72/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
84/81 = 84 × 1/81 × 1 = 84/81 - Subtract the two like fractions:
72/81 - 84/81 = 72 - 84/81 = -12/81 - After reducing the fraction, the answer is -4/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-84/81 8/18-84/81 24/9-84/81 8/27-84/81 40/9-84/81 8/45-84/81 56/9-84/81 8/63-84/81