SOLUTION: A department store sells a 4-pack of AAA batteries for $3.00 and an 8-pack of AAA batteries for $5.00. The cost of one battery from the 4-pack is what percent more than the cost of

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Question 411408: A department store sells a 4-pack of AAA batteries for $3.00 and an 8-pack of AAA batteries for $5.00. The cost of one battery from the 4-pack is what percent more than the cost of one battery from the 8-pack, before sales tax is applied?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A department store sells a 4-pack of AAA batteries for $3.00 and an 8-pack of AAA batteries for $5.00. The cost of one battery from the 4-pack is what percent more than the cost of one battery from the 8-pack, before sales tax is applied?
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Each battery from the 4-pack casts 300/4 = 75 cents
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Each battery from the 8-pack costs 500/8 = 62.5 cents
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Quantity difference is 75-62.5 = 12.5 cents
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Percent difference = 12.5/62.5 = 0.20 = 20%
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Cheers,
Stan H.
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