Probably more than half considering that half of our manual isn't actually anything useful. Pages 1, 2 and 14-24 are the cover, photosensitivity warnings, how to use a game card, FCC notices, and tech support details.
Page 3 is an index, Page 4/5/6 have controls.
7/8 is on how to change blood codes and a warning about the downsides of doing so (levels and abilities being tied to the blood code, abilities not being transferable, boost points being static and not able to be earned until you pass the highest level you have achieved in any blood code)
8 also has a paragraph on squad formation (its totality can be summarised as "Warriors front, Wizards back, Academics disable traps and identify stuff")
9/10/11 break down a character status screen and explain stats (okay, this part is useful, and explains the stats and the miss/evade chance stuff)
12/13 break down an item data screen (this too).