23andMe DNA tests claim to tell you what proportion Neanderthal you are. I, for example, have just under 2% Neanderthal DNA (allegedly), which they say is in the 47th percentile.
However, around 2013-14 they either changed the number of SNPs they considered Neanderthal origin or their algorithm changed, and I was PISSED because I went from 95th percentile to 47th-ish myself.