Subtract 56/81 from 7/84
7/84 - 56/81 is -197/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 84 × 27 = 2268,
7/84 = 7 × 27/84 × 27 = 189/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
56/81 = 56 × 28/81 × 28 = 1568/2268 - Subtract the two like fractions:
189/2268 - 1568/2268 = 189 - 1568/2268 = -1379/2268 - After reducing the fraction, the answer is -197/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-56/81 21/84-56/81 35/84-56/81 49/84-56/81