Dropdown Numeric Fields, Workaround?

Dropdown Numeric Fields, Workaround?

After reviewing the user guide and a few searches, it seems that the dropdown field can only be defined as a string.

I need to offer users a limited number of options, i.e. 1, 0.5, 0.25, 0.125  (even better choices in a dropdown menu would be 1, 1/2, 1/4, 1/8, etc. but creator doesn't seem to be able to separate labels and values in a dropdown)

I need to also generate reports using these numbers such as adding up the values for the records.  Are there any simple workarounds you've used to use numeric data in dropdown menus to run calculations or reports?