Display attribute manufacture in frontend Magento

I've been working with Magento for a short time and I do not know much about it yet, and my case is this: in the list of items display I would like to display the% / p>

I used the following code in manufacture :

<?php
    echo $_helper->productAttribute($_product, $_product->getManufacturer() , 'manufacturer');
?>

But it displays the ID and not the name.