Subtract 15/81 from 2/54
2/54 - 15/81 is -4/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
2/54 = 2 × 3/54 × 3 = 6/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Subtract the two like fractions:
6/162 - 30/162 = 6 - 30/162 = -24/162 - 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: 4/54-15/81 2/54-30/81 6/54-15/81 2/54-45/81 10/54-15/81 2/54-75/81 14/54-15/81