Problem with regular and sale price

I am having a problem when displaying the price of the product. When it is a product with variables, when showing the normal price and with sale in a product with variables, the two prices come out together, with the same class, so I can not modify the old price so that for example it is {text-decoration:line-through} because it affects both prices.

the code i see:

<span class=”woocommerce-Price-amount amount”><bdi>10.99<span class=”woocommerce-Price-currencySymbol”>€</span></bdi></span>/día <span class=”woocommerce-Price-amount amount”><bdi>5.99<span class=”woocommerce-Price-currencySymbol”>€</span></bdi></span>/día