Can anyone me with this ! i don’t know what to do

50 out of 100 is half of the class; half of the circle will represent students going to college.  25 is a quarter of the class; a quarter of the circle will represent students not going to college.  25 is a quarter of the class; a quarter of the circle will represent students undecided about going to college.

The circle graph should look something like this:

Are you trying to figure out the volume?