Only 'fifteen' (of them) showed up on time.
Their boat finished 'fifteenth'.
one 'fifteenth' of the total
(..) You should... You should probably call your mom. Did you tell her? She's probably just freaking out. fifteen kids that saw what happened. What was I supposed to do, then? Let her die? This isn't just about you. It's about all of us. I think we should (..)2008 Twilight