u/Babybrei123

Can somebody please tell me how I know how much to charge while I am at the fast charger? The route planner gives me the estimate, that I will arrive at the first charger with 29% but as soon as I plug in this row in the route planner disappears because I arrived at the destination.
Where do I find the information to charge to 77% while plugged in? If I do not check this information before plugging in I am totally lost how much to charge to, to arrive at the second charger with 20%.