jQuery数学两个浮点数

I try to math 2 float number and add them to ajax query. But didnt work. Here is my code:

    // All padejPremium_X is 225.00
    var amount = $("#padejPremium_2").val() / 100) * 2; // (225.00 / 100) * 2 = 4.5
    var data = {
        DueAmount0: $("#padejPremium_1").val() + 10.00,
        DueAmount1: $("#padejPremium_2").val() + amount,
        DueAmount2: $("#padejPremium_3").val() + amount,
        DueAmount3: $("#padejPremium_4").val() + amount,

I will be very glad if someone give a idea. Thanks in advance.

You have just missing the ( in first line. Check the below code:

var amount = ($("#padejPremium_2").val() / 100) * 2; // (225.00 / 100) * 2 = 4.5
var data = {
    DueAmount0: $("#padejPremium_1").val() + 10.00,
    DueAmount1: $("#padejPremium_2").val() + amount,
    DueAmount2: $("#padejPremium_3").val() + amount
    }
    console.log(data);

Check the demo here:

JSFiddle (check in console)