It only says 45 or whatever the page is on my kindles. It doesn't say out of so many pages. I wouldn't mind that being there also, but at this point I don't even get page numbers everytime.
For me I check the page number when I first open a book. It opens the about the book. Or if it was already opened before, I just go to about the book as I start the book. I pretty much only read one book at a time so it works for me.
When the page numbers are available, I can always tap the top screen and then it tells me of the bottom page 4 of 342 for example. In case I forgot how many pages the book has. Tapping the bottom or swiping up both gives that page info. If there are pages, otherwise it just gives locations.