Try this:
<li class="list-group-item">
<b>Rank Progress</b>
<?php $percentage = ($pilot_hours/$nextrank->minhours) * 100; ?>
<?php $round = round($percentage); ?>
<div style="width: 80%;display: inline;" class="progress-group">
<span class="progress-number"><?php echo $round ?>% Completed</span>
<div class="progress sm">
<?php echo "<div class='progress-bar progress-bar-blue-light' role='progressbar' aria-valuenow='60' aria-valuemin='0' aria-valuemax='100' style='width: ", $round, "%'></div>"; // Progress bar inner ?>
</div>
</div>
</li>