Shopping Discounts

Our main learning intention for maths has been to: Calculate percentage discounts on sale items.

Tonight when I was walking through the supermarket I took some photos of shelf tags showing the prices of items that were on special this week.  Next to many of these specials were signs showing the percentage discount of each item.





(Clicking on the thumbnail will bring up a full size image showing you all details)

Is this advertising accurate?

How can you tell?



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