I am trying to modify the way Magento 2.3.4 calculates percentage prices in product custom options to use the final price instead of base price so it returns this (base price £30 + options £10 + option 30% = £52)
I have updated updated :--
/app/design/frontend/Designnbuy/Printshop/Magento_Catalog/model/product/type/price.php
$finalPrice += $group->getOptionPrice($quoteItemOption->getValue(), $finalPrice);
and the percentage is added correctly to the cart but not updating on product page what else do I need to change?