var int = 10;
var float = parseFloat(int).toFixed(2);
console.log(float); // 10.00
var val = (parseFloat('2.3') + parseFloat('2.4')).toFixed(2)
//if you are adding dynamic values then use following example
var a = 2.3;
var b = 2.4;
var val = (parseFloat(a)+parseFloat(b)).toFixed(2);
var v1 = "1151.00";
v1 = v1.substring(0, v1.length - 1);
console.log(v1);
console.log(parseFloat(v1).toFixed(1));