To find out how many puzzles one student would complete, you can divide the total number of puzzles by the number of students.
\[ \text{Puzzles per student} = \frac{\text{Total puzzles}}{\text{Number of students}} = \frac{80}{22} \]
Calculating that gives:
\[ \frac{80}{22} \approx 3.6363 \]
When rounded to the tenth, it would be:
\[ \approx 3.6 \]
So, one student would complete approximately 3.6 puzzles.