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A store sells a watch for a profit of 25% of the cost. What

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A store sells a watch for a profit of 25% of the cost. What [#permalink] New post 20 Oct 2005, 21:44
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A store sells a watch for a profit of 25% of the cost. What % of the selling price is the profit?
VP
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 [#permalink] New post 20 Oct 2005, 22:31
in this kind of problem,always take an example, if possible using 100 so it will be easier to make the calculations :

100 is the cost
we need a profit of 100*25% = 25
selling price is 125

then cost/final price = 25/125 = 1/5 = 20%
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Re: PS profit [#permalink] New post 20 Oct 2005, 22:39
GMATT73 wrote:
A store sells a watch for a profit of 25% of the cost. What % of the selling price is the profit?


Let p, P and c be the price, profit and cost respectively.
we have:
p= c+25%c= 125%c => c= 80%p
P= 25%c= 25% ( 80%p)= 20% p

Hope this is correct ^_~
Re: PS profit   [#permalink] 20 Oct 2005, 22:39
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A store sells a watch for a profit of 25% of the cost. What

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