Understood. What "confuses" me is that it doesn't say "about half a percent", it says "about half of 1 percent" which I find is a bit like saying "about half of

Understood. What "confuses" me is that it doesn't say "about half a percent", it says "about half of 1 percent" which I find is a bit like saying "about half of 50" instead of "about 25".