Please tell me a easy way or any short way to do this

Question

I have made this percent calculator but it's too long please suggest a way which can make it short and more better
https://code.sololearn.com/WqYMnd1RJSwh/?ref=app

Answer 1

Why to use prompt use html input to make it more better.

And try asking the problem and errors here not suggestions

Answer 2

but what is the error the code is running well. thanks for the suggestion