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PercentComplete

configuration

The completion percentage of the task. A value between 0 and 1 representing how much of a task is completed.

percentComplete

String|Number|Object

Default: 0

<script>
var parentTask = new kendo.data.GanttTask({
    id: 1,
    title: "Parent",
    percentComplete: 0.55,
    start: new Date("2014/6/17 9:00"),
    end: new Date("2014/6/17 11:00")
});
</script>