Subtract 84/81 from 6/12
1st number: 6/12, 2nd number: 1 3/81
6/12 - 84/81 is -29/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
6/12 = 6 × 27/12 × 27 = 162/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
84/81 = 84 × 4/81 × 4 = 336/324 - Subtract the two like fractions:
162/324 - 336/324 = 162 - 336/324 = -174/324 - After reducing the fraction, the answer is -29/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/24-84/81 18/12-84/81 6/36-84/81 30/12-84/81 6/60-84/81 42/12-84/81 6/84-84/81