"90% of cells in our body are bacteria - organically, our bodies are only 10% human" That would be amazing, but of course those ~3 X 10^12 cells only weigh about a kilo, so yes, 'organically' (whatever that means in this context) bacterial cells outnumber ours by a large ratio, but in terms of mass or volume, they are only a few percent. Not to say they aren't extremely important.
Take it the other way around: if you think a 50 kg human is just as much "a human" as a 250 kg one and extrapolate from there to counting "living things", it is 3E12 bacteria vs one human. Makes the 'human' part negligible.
But of course, a drop of water on your skin would be over 1E20 molecules of H2O, so it would be dead things:living things > 1E7 (give or take a few orders of magnitude)
