To find the unit rate of apartments per floor, divide the total number of apartments by the total number of floors.
Given:
- Total apartments = 8
- Total floors = 2
The calculation is:
\[ \text{Apartments per floor} = \frac{\text{Total apartments}}{\text{Total floors}} = \frac{8}{2} = 4 \]
So, there are 4 apartments per floor.