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How to calculate cost savings percentage
Determine the original price of the product or service.
For most purchases, this is the retail price before any coupons or discounts are applied.
For example, if the original, retail price of a sweater is $50, use $50 as your original price.
For an hourly service, multiply the standard billing rate by the number of hours normally billed. Determine the new price of the product or service.