SOLUTION: The cost of coffee increased by 15% one week but fell back to the original price the next week. By what percentage did the cost of coffee fall in the second week? Give your ans

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: The cost of coffee increased by 15% one week but fell back to the original price the next week. By what percentage did the cost of coffee fall in the second week? Give your ans      Log On


   

Question 1057030: The cost of coffee increased by 15% one week but fell back to the original price the next week.
By what percentage did the cost of coffee fall in the second week? Give your answer to the nearest one per cent.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The cost of coffee increased by 15% one week but fell back to the original price the next week.
By what percentage did the cost of coffee fall in the second week? Give your answer to the nearest one per cent.
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Original cost:: x
after 15% increase:: 1.15x
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After falling back:: x
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Quantity fall in price = 0.15x
% fall in price = 0.15x/1.15x = 13%
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Cheers,
Stan H.
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