Subtract 27/4 from 2/81
1st number: 2/81, 2nd number: 6 3/4
2/81 - 27/4 is -2179/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
2/81 = 2 × 4/81 × 4 = 8/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
27/4 = 27 × 81/4 × 81 = 2187/324 - Subtract the two like fractions:
8/324 - 2187/324 = 8 - 2187/324 = -2179/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81-27/4 2/81-54/4 2/81-27/8 6/81-27/4 2/81-81/4 2/81-27/12 10/81-27/4 2/81-27/20 14/81-27/4 2/81-27/28