Subtract 84/81 from 8/27
1st number: 8/27, 2nd number: 1 3/81
8/27 - 84/81 is -20/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 27 × 3 = 81,
8/27 = 8 × 3/27 × 3 = 24/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
84/81 = 84 × 1/81 × 1 = 84/81 - Subtract the two like fractions:
24/81 - 84/81 = 24 - 84/81 = -60/81 - After reducing the fraction, the answer is -20/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/27-84/81 8/54-84/81 24/27-84/81 8/81-84/81 40/27-84/81 56/27-84/81