JSFiddle - React, Tailwind, and code Playground

JavaScript

function arredondar(str, casas) {
    if (str.indexOf(',') != -1) str = str.replace(',', '.');
    if (!casas) casas = 0;
    casas = Math.pow(10, casas);
    str = parseFloat(str) * casas;
    return Math.floor(str) / casas;
}

alert(arredondar('44,97714285714286', 2));