What formula represents how to calculate the level of discount?

To calculate the level of discount, the formula must identify the reduction in price compared to the original price. The correct formula subtracts the promoted price from the non-promoted price, which reflects the amount of discount received. This difference is then divided by the non-promoted price to express the discount as a percentage.

By multiplying this fraction by 100, you effectively convert the discount into a percentage format, making it easier to interpret and compare. Thus, this formula accurately represents the concept of a discount as it shows what portion of the original price is being reduced. Therefore, the correct answer effectively captures the intended calculation of discount level.