Calculating discounts using a calculator is a foundational skill in finance and retail. For instance, determining the final price of an item with a 20% discount requires calculating the discount amount and deducting it from the original price.
This technique has immense practical relevance, as it enables consumers to make informed purchases, businesses to set competitive prices, and financial analysts to assess investment opportunities. Notably, the invention of electronic calculators in the mid-20th century significantly simplified and popularized discount calculations.