Guys, I've made a little VAT calculator form, the user inputs the start amount then the VAT rate and it works great for adding the VAT percentage and breaking it down, however i'm trying to reverse the formular but can't get it to subtract ...

The answer is most likely right in front of me for this one, but i want to subtract the sum from textbox 1 off the value of textbox 2 and display the result in label3. I have a code snippet that works for adding the sum, but i need to re ...