Subtract 56/54 from 12/81
1st number: 12/81, 2nd number: 1 2/54
12/81 - 56/54 is -8/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 54 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
12/81 = 12 × 2/81 × 2 = 24/162 - Likewise, for the 2nd fraction, since 54 × 3 = 162,
56/54 = 56 × 3/54 × 3 = 168/162 - Subtract the two like fractions:
24/162 - 168/162 = 24 - 168/162 = -144/162 - After reducing the fraction, the answer is -8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81-56/54 36/81-56/54 60/81-56/54 84/81-56/54