JSFiddle - React, Tailwind, and code Playground
HTML
<div id="test">
Discount 7.5%<br>
Discount 15%<br>
discount 10%<br>
Discount 5.433%<br>
Fee 11%<br>
Discount 22.7%
</div>
JavaScript
var div = document.getElementById('test');
var text = div.innerHTML;
div.innerHTML = text.replace(/Discount (.*)%/ig,'$1');