Calculate supermarket discounts
You are comparing a shelf price with a sale offer. Enter the original price and the advertised percentage to work out what you save and pay.
Your experiment
Change any value to update the result. Use the stated units.
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Why it works
saving = shelf price × discount / 100
Assumptions and limits
Assumes a single discount and no additional fees. Compare the final price and quantity, since a discount does not guarantee the lowest unit price.