Open the Joomla! Administration panel
Under Components in the top menu, select VirtueMart
Under Configuration in the VirtueMart screen select **Currencies
**
Search for the currency where you wish to move the currency symbol to the front and select it to edit
Once the currency properties are open, edit the Positive Format and Negative Format text boxes by moving the {symbol} placeholder to the front as in screenshot below, these two fields will allow to to change the display of the currencies to the format you want.