JSFiddle - React, Tailwind, and code Playground
HTML
<div id="console">
</div>
JavaScript
const console = document.getElementById('console');
const ratio = 3.5161290322580645;
console.innerText = ratio + '\n' + Math.round(ratio) + '\n' + (Math.round(ratio * 100) / 100) + '\n' + (Math.floor(ratio * 100) / 100);