15*(1/5)2-8*1/5

Let's simplify the expression step by step:

1. First, let's handle the first part: \( 15 \times \left(\frac{1}{5}\right)^2 \).

   • Calculate \( \left(\frac{1}{5}\right)^2 = \frac{1}{25} \).
   • Next, multiply: \( 15 \times \frac{1}{25} = \frac{15}{25} = \frac{3}{5} \).

2. Now, let's simplify the second part: \( 8 \times \frac{1}{5} \).

   • This becomes \( \frac{8}{5} \).

3. Now combine the two results:

   • \( \frac{3}{5} - \frac{8}{5} = \frac{3 - 8}{5} = \frac{-5}{5} = -1 \).

So, the final result is \(-1\).