We are really arguing unimportant semantics here but I don't agree with you, when you say 50% of the population, you are saying 0.5 of the population or 0.5 of

We are really arguing unimportant semantics here but I don't agree with you, when you say 50% of the population, you are saying 0.5 of the population or 0.5 of 100M. The 50% always represents 0.5 when used correctly, in fact the % sign is a different way of writing "/100" (with some artistic freedoms).