Error in Input string was not in a correct format

Question

I'm getting the said error, help is appreciated thank you.

Dim GSTPrice As Double = Val(txtGst.Text / 100) * Val(txtSubTotal.Text)

Answer 1

I think you should use it like this:

Dim GSTPrice As Double = Val(txtGst.Text)/100 * Val(txtSubTotal.Text)

as txtGst.Text is a string you can not divide it by 100.