To find the unit rate of pages per day, you divide the total number of pages by the total number of days.
Given that there are 32 pages in 2 days, the calculation is as follows:
\[ \text{Pages per day} = \frac{32 \text{ pages}}{2 \text{ days}} = 16 \text{ pages per day} \]
So, the unit rate is 16 pages per day.