Find the total number of students that own more than 2 pets:
5 students own 3
4 students own 4
2 own 5
1 owns 6:
5+4+2+1 = 12 total students own more than 2 pets.
Divide that by total number of students:
12 / 30 = 0.4
0.64 x 100 = 40%
The answer is 40%.