C# - Hide Text In A ASPX Page That Is Tied To A Textbox?

So there is a a table and a text box in one of the cells

<td>
<asp:TextBox ID="tbSomeTextBox" Columns="5" runat="server"> %
</td>

This textbox gets shown if a certain selection is made in a drop down. The problem is that I would like the "%" character to also be hidden or shown with the textbox.

I have tried putting the whole textbox control inside a DIVand in my JQuery hiding the DIV at the same time I hid the textbox.

<td>
<div id="divSomeDIV"><asp:TextBox ID="tbSomeTextBox" Columns="5" runat="server"> % </div
</td>

But I get an error in my java script that id="divSomeDIV" doesn't exist in the current context.

$("#<%=divSomeDiv.ClientID%>").hide();

Wrapping that single character in a asp:Label seems like overkill.