I want to calculate and show net price in textbox

[praful rajput]

Hello!!!

I am fresher for HTML, and now doing like this kind of imagin.......

Now i want to show net amount in TextBox..

User will input Price and Discount Rate then auto calculate net amount and shown in Text Box..
eg:

Prince: 100.00
Dis Rate: 10%
Total: 90.00

I waiting your response soon........plz reply me
Thanks