Responsive Bootstrap Datatable not collapsing columns at the correct point

Add Div with class “table-responsive” before table start and delete width = “100%” from table tag ,

<div class="panel panel-primary" style="margin: 50px;">
<div class="panel-heading">
    <h3 class="panel-title">Panel title</h3>
</div>
<div class="panel-body">
    <div style="width: 100%; padding-left: -10px; border: 1px solid red;">
    <div class="table-responsive">  <-- add this div
        <table id="example" class="table table-striped table-hover dt-responsive display nowrap" cellspacing="0"> <-- remove width from this
            <thead>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Extn.</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
            </thead>
        </table>
        </div>
    </div>
</div>