percentage is measured differently when it comes to scientific notation. It's a strange concept, but this is what it is. Im not sure if it's the case here, but it can be
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it like likely logarithmic (base 10). log(base10) of 1e4 is 4. log10 of 1e5 is 5.
4 is 80% of 5 because 4/5 = 0.8
the 1e4 is an abbreviated form of scientific notation, the long form being 1x10^4.
The reason you are seeing 85% is likely because 1e4 does not show enough decimal places and is likely something like 1.49e4 which would be about .85 of 1e5.