Previous posts in this discussion:
PostDid the Eastern Front Claim 90% of German Casualties? (Cameron Sawyer, Russia, 06/16/19 11:14 am)
To address John E's question, we will never know the exact number of dead on either side on the Eastern Front. I have with my own eyes seen skeletons still lying in the forest near Vyazma, with shreds of Wehrmacht uniforms still on them. I have a Wehrmacht helmet in my garage with a bullet hole through both sides of it, picked up from next to one of them.
But the latest work on WWII casualties looks pretty solid, and shows 2,742,909 dead on the Eastern Front through the end of 1944, compared to 339,957 in the West. 1945 is a little more difficult, but if we believe the official Heeresarzt weekly casualty reports for 1945, 83% of the 1,230,045 killed in the "final battles" of 1945 occurred in the East. Then if you consider another million German soldiers missing in the East, two or three of whose bones, no doubt, were among those I saw with my own eyes, then the total is well over 90%. See: https://en.wikipedia.org/wiki/German_casualties_in_World_War_II
90% is an approximate number, but is widely accepted by historians--as an approximation. The reality might be 80% or might be 95%, and I doubt if we will ever know exactly.
JE comments: The essential takeaway: the true killing fields for German combatants were in the East.