I have been messing around with my 3D printer quite a bit and nowadays my prints usually work out well. I sometimes still have failed prints though, and in this case a 5 hour print failed just a bit over half of a print. I wish to simply reuse the bottom part which was printed (so my time wasn't a complete waste), and just print the upper part.
That's why my question is how I can remove a certain known percentage of the full 3D object, so I can export the remaining part with the same scale as the original and simply glue them together after. In this example, I estimate a good 200/375 layers (of 0.3mm, first one 0.35mm) were finished, so 53.333..%