Only 'fifteen' (of them) showed up on time.
Their boat finished 'fifteenth'.
one 'fifteenth' of the total
(..) Get up, let's go. Get up, I tell you. Mum, please. I don't want you to stay here. No, Mum, I won't let you. Is fifteen million more important than your child's life? I won't let you do this. If your child is not important... Mum, please listen, why are you doing this? (..)2011 A Separation
(..) I can hear you. I went and spoke to her husband today. Sit down. I managed to get him to agree to take fifteen million instead of forty million. Three five-million checks in exchange for his consent. How dare you speak to him about money? (..)2011 A Separation