Apositive number is 5 times another number if wee subtract 1 from the larger and add 3 to the smaller then one of them becomes 3 times the other

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking?