If a students rank in class of 500 is 165 what the percentile tank?

The student's rank is 165 out of 500. This means they scored better than 500 - 165 = 335 students.

To find the percentile rank, we calculate the percentage of students the student scored better than:

(335 / 500) * 100% = 67%

Therefore, the student's percentile rank is approximately $\boxed{67}$.