Hi everyone, Happy new year!! I am having a major senior moment and I need some mathematical help. I am typically one of those who is really good at math and physics but perhaps its the state of affairs in the world or a nasty head cold that I, for the life of me, cannot assess what is the accurate formula to calculate the range loss/gain %. Can someone please help me? Here's the scenario: Lets say I start with 200 miles of rated range that my Model S computer is showing as soon as I remove the charger. I drive 50 actual miles but the range I am left with is 130 miles instead of 150 miles. In this case what is your range loss %. Can someone kindly tell me the accurate formula to be used for this? I know this is all sorts of dumb but like I said I feel like half my brain has fallen off and I need help staying accurate. Thank you very kindly!