Suppose ocean-going freighters regularly use the straits off the coast of Country Q to save travel time. Suppose also that these straits have recently become the subject of pirate attacks. You, as an intelligence analyst, have been asked to calculate the decrease in international shipping using these straits after the appearance of pirates. The daily number of ships before the pirate attacks was 416 and after was 232. What was the percentage decrease due to this hostile maritime activity?