fixed after decimal in javascript

var num1 = "2";
document.getElementById('num1').innerHTML = parseFloat(Math.round(num1 * 100) / 100).toFixed(2);

var num2 = "1.341";
document.getElementById('num2').innerHTML = parseFloat(Math.round(num2 * 100) / 100).toFixed(2);

var num3 = "2.345945829374985723";
document.getElementById('num3').innerHTML = parseFloat(Math.round(num3 * 100) / 100).toFixed(2);