Whats wrong with this syntax especially in the bolded area
if ($member['posts'] and $board_posts)
{
$info['posts_day'] = round( $member['posts'] / (((time() - $member['joined']) / 86400)), 1);
$info['total_pct'] = sprintf( '%.2f', ( $member['posts'] / $board_posts + 482,831 * 100 ) );