Newbie needs help ... jquery

OK sorry if this has already been asked, but i need help with jquery

found out a php generator i've been using to develop a website for work actually codes in Jquery... *go figure*

i have a data grid that has a column count in the footer of the grid

// View column for name field
    //
    $column = new TextViewColumn('employees_name_name', 'Employees Name', $this->dataset);
    $grid->SetTotal($column, Aggregate::Count);
    $column->SetOrderable(true);
    $handler = new ShowTextBlobHandler($this->dataset, $this, 'name_handler', $column);
    GetApplication()->RegisterHTTPHandler($handler);

Is there a way i can create a Percentage of employees in the filtered datagrid against the actually number of employees listed in the database

EG if we have total of 150 employees in the employee database but only 15 are listed in the datagrid after filters have been applied.. can i get the footer to read in the same footer cell

Count = 15
percentage = 10%

and if possible can i get it to change colour based on value of the percentage against predetermined values