1//There are meny ways of rounding...
2Math.floor(5.5) //Answer 5, it alwas rounds down.
3Math.round(5.5) //Answer 6, it simpily rounds to the closest whole number.
4Math.ceil(5.5) //Answer 6, it alwas rounds up.
5
6//You can do more things too...
7Math.floor(5.57 * 10) / 10 //Answer 5.5, the number turns into 55.7, Then gets floored (55.0), Then gets divied, (5.5).

1Math.round(3.14159 * 100) / 100  // 3.14
2
33.14159.toFixed(2);              // 3.14 returns a string
4parseFloat(3.14159.toFixed(2));  // 3.14 returns a number
5

1//You can do this instead of using math.round! It is easier to understand using this function!
2
3var x = 5.0364342423;
4console.log(x.toFixed(2));
5//result should be 5.04