Add new value & Display new calculated value in input box

Hi guys,
I’m newbie in coding.I want to create input box with user input number ( from 0-28) & the result (percentage) displayed in another box. For example if user type 5 and the result 17.85% shows in another text box. The formula : user input number/28x100%.

I really appreciate for your help.Thanks

On change of the input you can run your equation and then set the value of the next input to the returned value

See the api documentation for examples and more reading to learn
https://www.wix.com/velo/reference/$w/textinput/onchange
https://www.wix.com/velo/reference/$w/textinput/value

if you do not want this calculation to happen on every change of the input, you could alternatively use a button to trigger the calculation to happen as well.