Find the difference
1 160
2 810
3) 22 - 1 =
4) 520
6) 444 =
5) 48 - 10 =
7) 60 -0 =
8) 33 - 1 =
10) 68 - 7 =
9) 70 - 0 =
12) 96 - 4 =
11) 47 - 4 =
14) 53 - 3 =
13) 84 - 4 =

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?