Final answer:
The promotion type that shows the original price, sale price, and amount saved is usually a Percentage discount, which helps consumers see the value of the sale.
Step-by-step explanation:
The type of promotion that lists the original price, the sale price, and the amount saved on the product detail page is typically a Percentage discount. When retailers offer a percentage discount, they often show consumers how much they're saving by presenting the original price, the discounted price after the applied percentage off, and the total dollar amount saved as a result of the promotion.
This helps customers to see and understand the value they are getting from the sale. A fixed amount discount may also show the amount saved, but the distinctive feature of a percentage discount is specifically the calculation of savings based on a percentage of the original price.
The percentage discount is displayed on the product detail page, along with the original price and the amount saved.
For example, if a shirt is originally priced at $50 and is on sale for 20% off, the product detail page will show the original price as $50, the sale price as $40, and the amount saved as $10 (which is 20% of $50).