Total number of students = 52 Number of failed students = 15 Number of students who passed = $52 - 15 = 37$

Ramesh's position on the merit list is 22nd from the top among the 37 passed students.

Position from the bottom = Total students who passed - Ramesh's position from the top + 1 Position from the bottom = $37 - 22 + 1 = 16$th

Thus, Ramesh's position from the bottom is 16th.