PHP division by zero error -

i did research division 0 error in php. found couple of of them said if statement did code below, still getting error, can tell me what's wrong code?

<?php   $result = array(   'price' => 0,   'special' => 80  );  $product = array(   'savings' => round((($result['price'] - $result['special'])/$result['price'])*100, 0)  );  if ($result['price'] == 0) {   echo $result['price']; } else {   echo "you save " . $product['savings'] ."%";  }  ?> 

i tried both

if == 0 , if != 0   

as new php, won't if statement mean if price of product = 0 echo out price , if it's not echo out special price?

i'm not allowed move $product array.

this seems make more sense, money-wise: check first if price higher special, , if so, perform calculation.

$product = array(   'savings' => ($result['price'] > $result['special'] ? (round((($result['price'] - $result['special'])/$result['price'])*100, 0)) : 0)  );