To simplify the expression \((12r - 8) \times \frac{1}{4}\), you can distribute \(\frac{1}{4}\) to both terms inside the parentheses:
\[ (12r - 8) \times \frac{1}{4} = \frac{12r}{4} - \frac{8}{4} \]
Now simplify each term:
\[ \frac{12r}{4} = 3r \] \[ \frac{8}{4} = 2 \]
Putting it all together, we get:
\[ (12r - 8) \times \frac{1}{4} = 3r - 2 \]
So the simplified expression is:
\[ 3r - 2 \]