# Artificial Neural Network Example Problem

I was looking at an example of a NN but I dont understand in the Answer i where the .68 come from or .6637

This is the link of the tutorial

That funciton is: $$\sigma(x) = \frac{1}{1+ e^{-x}}$$ so just substitute $x = 0.755$ into that to get 0.68026719669.