Dim as Decimal?

I have a userform and I have been using
(Dim cases as Integer) for some calculations

What Dim do I use if I want the result to show as a partial?

Example:
txt =textbox input

txtCasepack: 5
txtQty: 16

Dim cases as Integer

cases = txtQty / txtCasepack

Result: cases = 3

Result I want: cases = 3.2

Thank you