Use the graph to determine the difference in the percentage of students who have dogs for pets and the percentage of students who have hamsters for pets. Round the percentages to the tenths place.

To find the difference in percentages, we need to compare the percentage of students who have dogs for pets (45.5%) and the percentage of students who have hamsters for pets (7.3%).

Difference = 45.5% - 7.3% = 38.2%

Therefore, the difference in the percentage of students who have dogs for pets and the percentage of students who have hamsters for pets is 38.2%.