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If there is a 10% sale on an item, and then a 9% sales tax applied to the after sale price, then what is the total cost of the item including tax as a percentage of it's pre-sale sticker price? ​
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37 votes
If there is a 10% sale on an item, and then a 9% sales tax applied to the after sale price, then what is the total cost of the item including tax as a percentage of it's pre-sale sticker price? ​

User Holy Mackerel
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1 Answer

12 votes
12 votes

Answer:

A 10% sale means that the post-sale price of the item is now 90%, or 0.9 of the original cost of the item. We then apply 9% sales tax by multiplying the 0.9 by 109%, or 1.09. 0.9 * 1.09 = . 981, so the total cost of the item is 98.1% of the original pre-sale sticker price.

Step-by-step explanation:

User Kanwarjeet Singh
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