/0,25-81=

To solve the expression \(0.25 - 81\):

1. Convert \(0.25\) to a fraction: \(0.25 = \frac{1}{4}\).
2. We can also convert \(81\) to a fraction: \(81 = \frac{81}{1}\).
3. To subtract these fractions, we need a common denominator, which is \(4\).

Now, we convert \(81\) into a fraction with a denominator of \(4\):

\[ 81 = 81 \times \frac{4}{4} = \frac{324}{4} \]

Now we can perform the subtraction:

\[ \frac{1}{4} - \frac{324}{4} = \frac{1 - 324}{4} = \frac{-323}{4} \]

Therefore, \(0.25 - 81 = -\frac{323}{4}\) or \(-80.75\) in decimal form.