There are number of ways to select interest rates. This one lets you select a value from a dropdown:
The settings allow you to change the label and its position and set up the dropdown values:
The only restriction is that you can only have one number in each value.
This will work:
Car loan: 3%, Buy beer: 20.3%
Car loan for 12 months: 3%, Buy beer, wine, spirits: 20.3%