Subtract 6/12 from 1/81, Solve 1/81

Subtract 6/12 from 1/81

1/81 - 6/12 is -79/162.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324

Next, find the equivalent fraction of both fractional numbers with denominator 324
For the 1st fraction, since 81 × 4 = 324,
1/81 = 1 × 4/81 × 4 = 4/324
Likewise, for the 2nd fraction, since 12 × 27 = 324,
6/12 = 6 × 27/12 × 27 = 162/324
Subtract the two like fractions:
4/324 - 162/324 = 4 - 162/324 = -158/324
After reducing the fraction, the answer is -79/162

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