JSFiddle - React, Tailwind, and code Playground
HTML
The percentage <span id="Percent"></span>
<p>
<button id="click" type ="button">
Percentage
</button>JavaScript
document.getElementById('click').oneclick =click;
var a=1000;
var b=5000;
var percent=((a/b)*100);
document.getElementById("Percent").innerHTML=percent;