Show discount in percentage + Exclude certain items from overall discount

Hi ,

In figured out how to do the discount in percentage due to antoher post .
Yet i cant seem to figure out how to adjust the view file to show the percentage amount rather than the calculated discount .

For example a 100 € product with a 10 % discount shows as 10€ how can i change this 10€ to show 10 % ?

Also one other thing , not sure if this is implemented yet , but is there a way to exclude certain items from the overall discount ? An item beeing man hours ?

Thanks in advance