@Anonymous
You can specify what you want for data in combo boxes as well as most all of the other controls.
For your case, you can set the Items property of the ComboBox to the following:
["0%", "25%", "50%", "75%", "100%"]
This will create a single column table data source for your combobox. It will have a Value column (which is what you would choose to display).
So, later you can reference that value for any other conversions. For example, in your Update property, you can put in logic to convert such as this:
Switch(comboBoxx.Selected.Value,
"0%", someOtherValueFor0,
"25%", someOtherValueFor25,
etc
)
However, another option you can choose is to define the alternate value as part of the datasource you create in the Item property.
So, for example, if conversion to numbers rather than text is what you want, then you can do something like this in the Items property:
Table({Value:"0%", Number:0},
{Value:"25%", Number:.25},
{Value:"50%", Number:.5},
{Value:"75%", Number:.75},
{Value:"100%", Number:1})
This will create a two column table with a Value text column and a Number numeric column.
Then later on in your Update, you can reference the number assigned to that value, for example:
comboBoxx.Selected.Number
I hope this is clear and helpful for you.