We’re actually 98% or 95% or anything in between similar to most living things. (Like bananas have 50% the same genes as us)
This doesn’t mean we are 99% chimp, it just means that we have 99% of our genes the same as chimps. They will have some extra, and we will also have some that they don’t. This doesn’t necessarily cause the differences between us and chimps, that is caused by /what the genes are doing/, which isn’t necessarily counted in that 99%. We actually have quite a lot of ‘junk’ DNA that doesn’t appear to do anything.
DNA is such a huge molecule, that just 1% can make a huge difference – with us, it’s probably conciousness. Physically we’re very similar, and it is our brains that make most of the difference between us and the apes.
Our large brains allow us language, they allow us to make tools, and they make us social. That’s all you really need to make a human. That, and a razor, to get rid of all the monkey hair (except the moustache!)