It seems like you're trying to solve or simplify the expression \(1 - 0.8k = 1\).
To isolate the variable \(k\), we can start by simplifying the equation:
\[ 1 - 0.8k = 1 \]
Subtract \(1\) from both sides:
\[ -0.8k = 1 - 1 \]
This simplifies to:
\[ -0.8k = 0 \]
Next, divide both sides by \(-0.8\):
\[ k = \frac{0}{-0.8} \]
This yields:
\[ k = 0 \]
So, the solution to the equation is \(k = 0\).