Subtract 15/6 from 15/81
1st number: 15/81, 2nd number: 2 3/6
15/81 - 15/6 is -125/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 6 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Likewise, for the 2nd fraction, since 6 × 27 = 162,
15/6 = 15 × 27/6 × 27 = 405/162 - Subtract the two like fractions:
30/162 - 405/162 = 30 - 405/162 = -375/162 - After reducing the fraction, the answer is -125/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/81-15/6 15/81-30/6 15/81-15/12 45/81-15/6 15/81-45/6 15/81-15/18 75/81-15/6 15/81-75/6 15/81-15/30 15/81-15/42