There are two possible solutions, depending on how you want to control the assigned value.
Case 1 . If you want this value to 12.3456display as 12.3456%, you must do:
$("#percent").kendoNumericTextBox({
format: "##.0000 \\%",
decimals: 4,
value: 12.3456
});
Case 2 . If you want the value 12.3456displayed as 1234.5600%, you should do:
$("#percent").kendoNumericTextBox({
format: "p4",
decimals: 4,
value: 12.3456
});
3. , 12.3456 1234.56%, :
$("#percent").kendoNumericTextBox({
format: "p2",
decimals: 4,
value: 12.3456
});
: http://jsfiddle.net/OnaBai/4ab9Z/