Question
A man realizes he lost the detailed receipt from the store and only has the credit card receipt with the
after-tax total. If the fafter-tax total was
, and the tax rate in the area is
, what was the pre-
tax subtotal?
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after-tax total. If the fafter-tax total was
tax subtotal?
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Ask by Nichols Wang. in the United States
Mar 29,2025
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Tutor-Verified Answer
Answer
The pre-tax subtotal was $730.
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Bonus Knowledge
To find the pre-tax subtotal, you need to undo the tax calculation. The relationship between the pre-tax subtotal § and the after-tax total (A) is given by the formula:
. In this case, we can rearrange it to find
.
Plugging in your numbers:
. So, the pre-tax subtotal is approximately
.
Feeling like a math wizard now, right? It’s always fun to solve real-life puzzles like this!
Now, next time you’re at the store, make sure to keep an eye on those receipts—digital copies are a great backup. They can save you from these puzzles and help when returns are on the horizon!