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Bunuel
A car manufacturer, tippled the price of a car and by this quadrupled percentage of profit on it. What was the original profit percentage on the car ?

A. \(33 \frac{1}{3}\%\)

B. \(66 \frac{2}{3}\%\)

C. \(100\%\)

D. \(200\%\)

E. \(6666 \frac{2}{3}\%\)

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­

Let the initial cost price (CP) be x and, the selling price (SP) be y. Therefore, the initial percentage profit was (y-x)/x.
According to the question, CP is the same but SP becomes 3y. Therefore, the percentage profit becomes (3y-x)/x.
Given, (3y-x)/x = 4*(y-x)/x or, y=3x.
So, original profit percentage was (3x-x)/x *100=200%. Option (D) is correct.­
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Given: A car manufacturer, tripled the price of a car and by this quadrupled percentage of profit on it.
Asked: What was the original profit percentage on the car ?

Let the original price of the car be x & original profit percentage be p%.
Cost of the car = x/(1+p%)

Price of the car after tripling the price = 3x
Profit = 3x - x/(1+p%) = 4p%x/(1+p%)
3(1+p%) - 1 = 4p%
2 = p%
p% = 200%

IMO D
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Does anybody know why we divide the profit by cost price when we calculate the profit percentage? It seems to me profit margin should be calculated by profit/sale price instead?­ I don't seem anywhere they are implying profit percentage as profit markup.
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Does anybody know why we divide the profit by cost price when we calculate the profit percentage? It seems to me profit margin should be calculated by profit/sale price instead?­ I don't seem anywhere they are implying profit percentage as profit markup.
­The point is profit and loss are calculated from the cost price, not the sales price.
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Bunuel

acethegmat6969
Does anybody know why we divide the profit by cost price when we calculate the profit percentage? It seems to me profit margin should be calculated by profit/sale price instead?­ I don't seem anywhere they are implying profit percentage as profit markup.
­The point is profit and loss are calculated from the cost price, not the sales price.
­Is this something we always assume unless stated otherwise? Thanks Bunuel.
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acethegmat6969

Bunuel

acethegmat6969
Does anybody know why we divide the profit by cost price when we calculate the profit percentage? It seems to me profit margin should be calculated by profit/sale price instead?­ I don't seem anywhere they are implying profit percentage as profit markup.
­The point is profit and loss are calculated from the cost price, not the sales price.
­Is this something we always assume unless stated otherwise? Thanks Bunuel.
­Yes, this is how it is.
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Initial profit = x%
Initial C.P = 100
Initial S.P = 100 + x
After trebling = 3(100+x)
hence ,

(3(100 +x) - 100 ) / 100 * 100 = 4x ( profit percentage become 4 times than the initial percentage)

x= 200%

d is the answer.
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