Percentage price change

Question

i want in details product page display with $_product->getPrice() and $_product->getSpecialPrice(), also the percentage by which the price has been changed, how i can display this percentage in page?

Thanks

Answer 1

$origPrice = $_product->getPrice();
$finalPrice = $_product->getFinalPrice();

$percentage = ($origPrice - $finalPrice) * 100 / $origPrice;

This covers both cases: when you have a special price and when you have a catalog rule that discounts your product price.
All you need to do is print the $percentage variable.
Also, do a verification if $origPrice is not zero, and format the variable value as you want.