when i enter equations like pi-(5pi/4), i get a decimal as an answer. is there any way to change that into a fraction with a pi? does that make any sense??? i have a TI-84 silver edition and im in a trig class. all the answers are pi/2, 3pi/4, etc, but my calculator always gives me decimal answers. oh, and i tried the math button with the Frac feature, and that doesn't work. 10 points for the answer that works!!! Thanks! 
i understand that pi is a decimal...but if you read the question, that's clearly not what im asking.
i understand that pi is a decimal...but if you read the question, that's clearly not what im asking.