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Because the second discount refers to the already-discounted price,

not to the original full price.

Example:

-- The item was originally priced at $100.

-- It was discounted 20%, and that brought its price down to $80.

-- If it's discounted again later, then the second 20% discount will be 20% of $80,

not 20% of $100.

20% of $80 is $16, so the second discount will reduce the price to $64.

-- If it had been reduced from $100 all the way to $64 in one cut the first time,

that discount would have been 36% .

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Q: Why is 20 percent off an item plus an additional 20 percent off not 40 percent?
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Continue Learning about Math & Arithmetic

An item is on sale for 15 percent off and a customer has a coupon for an additional 10 percent off that same item If the item's original cost is 10.00 how much will it cost after the discounts?

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Related questions

An item is on sale for 15 percent off and a customer has a coupon for an additional 10 percent off that same item If the item's original cost is 10.00 how much will it cost after the discounts?

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