In a popular online role playing game, players can create detailed designs for their character's "costumes," or appearance. Leah 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.
31 visitors purchased no costume.
371 visitors purchased exactly one costume.
21 visitors purchased more than one costume.

Based on these results, express the probability that the next person will purchase no costume as a percent to the nearest whole number.