Subtract 12/54 from 4/81
4/81 - 12/54 is -14/81.
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,
4/81 = 4 × 2/81 × 2 = 8/162 - Likewise, for the 2nd fraction, since 54 × 3 = 162,
12/54 = 12 × 3/54 × 3 = 36/162 - Subtract the two like fractions:
8/162 - 36/162 = 8 - 36/162 = -28/162 - After reducing the fraction, the answer is -14/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/81-12/54 4/81-24/54 12/81-12/54 4/81-36/54 20/81-12/54 4/81-60/54 28/81-12/54 4/81-84/54