Given data:
The numbers of student like comedies are c=12.
The numbers of student like drama are d=18.
The numbers of student like documentaries are D=13.
The numbers of student like new program are n=7.
The expression for the perecentage of the students who like comedies is,

Substitute the given values in the above expression.

Thus, the perecentage of the students who like comedies is 24%.