Need help

Question

LblSubTotal.Text = GetItemTotal().ToString("N2");
String subTotal = LblGST.Text;
String GST = "subTotal * 0.07";             GST = LblGST.Text;
It since that my GST is not * 7% of the subTotal please help with this as the subprice have price

Vulpes · Answer

You can but you have to use a conversion function such as CDbl, Convert.ToDouble or Double.Parse.
I used Double.TryParse in my earlier post because, if the string can't be converted to a double for some reason, then this method will set ST to the 'harmless' value of zero.

Tan Kai Kai · Answer

Can I change a string to double?
becasue my st is a vlaue that grab from a method

Vulpes · Answer

Try:
Dim ST As Double
Double.TryParse(LblSubTotal.Text, ST)
Dim GST As Double = 0.07 * ST
LblGST.Text = GST.ToString("N2")