Slot tournament win % help

So i was wondering how the winning % works on slout tourneys. I see it says like either top 20% or top 10% win, so does that mean if theres only 6 people participating and top 20% win does that mean only 1 person can win? and does that one person get all the prize money or only the first place prize money? or does it mean only 5 people can win?