Please advise how to achieve the result in the attached question. Thanks, K
Answer: E
GMAT Prep #2_PS Percents #35
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I solved this one a little differently. We have a difference of 3% in sales tax rates and $12 in purchase price. At 3%, we are paying $3 in tax per $100. 12/3 = 4, so the base price is $400. At 8%, we're paying $8 per $100, so the tax amount is 8*4 = 32.
400 + 32 = $432
400 + 32 = $432
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Let us assume that Connie's purchase = $xkwah wrote:Please advise how to achieve the result in the attached question. Thanks, K
Answer: E
Then 5% of x = 8% of x - 12
0.05x = 0.08x - 12
12 = 0.03x
So, x = $400
Therefore, the total amount Connie paid for her purchase including sales tax = 400 + (0.08 * 400) = [spoiler]$432[/spoiler]
The correct answer is E.
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