Add percentage saved to specials

So for us beginners who are keen to learn, am I right in thinking that for 1.5.x it goes a little something like this:

1) Open catalog/controller/module/special.php 

2) Find

CODE: SELECT ALL

if ($this->config->get('config_review_status')) {

3) Before it, add 

CODE: SELECT ALL

if ((float)$result['special']) {
$saving_value = $result['price'] - $result['special'];
$saving = round(($saving_value/$result['price'])*100, 0);
} else {
$saving = false;
}

4) In same file, find

CODE: SELECT ALL

'name' => $result['name'],

5) After it, put

CODE: SELECT ALL

'saving' => $saving,

If that's the case, I can't get it to work. 

Last edited by aledmann on Thu Nov 24, 2011 10:32 am, edited 4 times in total.