In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. Camden sets up a website where players can buy and sell these costumes online. Information about the number of people who visited the website and the number of costumes purchased in a single day is listed below. 206 visitors purchased no costume. 87 visitors purchased exactly one costume. 4 visitors purchased more than one costume. Based on these results, express the probability that the next person will purchase exactly one costume as a fraction in simplest form.