QS:Suffix
From LimeSurvey Manual
Suffix (suffix)
Description
A text value to be suffixed to a text entry box. The prefix is shown just right of the input.
On little screen : prefix is show below the input. If you want to leave it at right (New in 3.0.0 ) : add suffix-prefix-force class to the question.
Example
Entering a value of "%" for this attribute would result in a percentage sign being displayed immediately after the text input box.