Custom function writing on calculator

I'm sitting here with my TI-89 Titanium and having fun writing some custom functions for this test on friday.

Question: bmp(b1,b2,b3) Func binompdf(b1,b2/100,b3)*100

What do I need to inp开发者_开发技巧ut to make the result show with a % symbol in the end? So instead of jut displaying a 20, it would display 20%?

Please share your tips and tricks if you have any, would be greatly appreciated.

Btw if anyone is curious the test is in calculus, integral, vectors and more.

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Assign the functions output to a variable (say test_var.) Then try: Disp test_var & "%"

or, more rudimentary: Disp test_var & "percent"