condition IF inside an array PHP

I have this code:

                $data['products'][] = array(
                'percent'     => sprintf($this->language->get('-%s'), (round((($result['price'] - $result['special'])/$result['price']) * 100 ,0 ))) . ' %',
                'product_id'  => $result['product_id'],
                'thumb'       => $image,
                'name'        => $result['name'],
                'description' => utf8_substr(strip_tags(html_entity_decode($result['description'], ENT_QUOTES, 'UTF-8')), 0, $this->config->get('config_product_description_length')) . '..',
                'price'       => $price,
                'special'     => $special,
                'tax'         => $tax,
                'minimum'     => $result['minimum'] > 0 ? $result['minimum'] : 1,
                'rating'      => $result['rating'],
                'href'        => $this->url->link('product/product', 'path=' . $this->request->get['path'] . '&product_id=' . $result['product_id'] . $url)
            );
        }

I need to make condition if price===0, then percent ===0. Pls help.