I'm really confused now. I read the article but don't follow it. I've read that we and chimps share over 90% of our genes. Therefore oughtn't we and Neandert

I'm really confused now. I read the article but don't follow it. I've read that we and chimps share over 90% of our genes. Therefore oughtn't we and Neanderthals share more genes than that? Certainly more than 2.4%. My guess is maybe it's 2.4% of the genes that human beings have and chimpanzees do not? Can anybody help me out on this?