show discount prices if listprice is more than 0

Ok, not sure how i should explain this but i need some help.

I have made a script to show items with prices.
I have following cells:
ListPrice
OurPrice

What i would like is to do is following.
If i add under Listprice lets say 50,00 and OurPrice is 25,00
I would like that users would see following:
Price: 50,00
Our Price: 25,00
You save: 25,00 (50%)

But if i have ListPrice 0,00 and OurPrice 50,00
I would like that users would see following:
Our Price: 25,00

I did the  discount and works fine, all i need is to show all prices with discount if list price is not 0,00 or other way around.

I use dataList.

My code:

List Price: € <asp:Label ID="RednaCenaLabel" runat="server" Text='<%# Eval("ListPrice", "{0:N}") %>' Font-Strikeout="True"></asp:Label><br /> <font color="#c00000"><b>Our Price:</b> € <asp:Label ID="NasaCenaLabel" runat="server" Text='<%# Eval("OurPrice", "{0:N}") %>' Font-Bold="True" ForeColor="#C00000"></asp:Label><br /> Discount: € <%#FormatNumber(Eval("ListPrice", "{0:N}") - Eval("OurPrice", "{0:N}"))%> (<%#FormatNumber(((Eval("ListPrice") - Eval("OurPrice")) / Eval("ListPrice") * 100))%>%)

I started the code like that but i dont get the result i wanted:
Dim Myprices As Integer
Myprices = Request.QueryString("ListPrice")

If Myprices = "0,00" Then....

but it's not working


Thanks.