chiccufrazer1 wrote:
Increasing the original price of an article by 15% and then increasing the new price by 15% again is equivalent to increasing the original price by what %?
A.34 B.40 C.68 D.88 E.102
Hey guys this might be as simple as abc for a math problem to you but not me..anyway this is how i did it after reading a gmat study guide on percents from platinumgmat albeit i dd not pretty well understand it..the two percentages in decimal form,will be as 0.15 each..x(0.15)multiply(0.15) the result is 1.3325x..to one decimal place it is 1.3x..i then found the percentage increase {(end value - start value)/start value)}*100 hence {(1.3225x-x)/x)}*100 =32.25 (to the nearest whole number;32..but among the answer choices there is no 32)how did i get it wrong?please help
To INCREASE a certain number by 15%, you will have to multiply by 1.15
To DECREASE a certain number by 15%, you will have to multiply by 0.85.
To find what 15% of a certain number is, you will have to multiply by 0.15
Lets say the original price of the article is 10$
Multiplying 10 by 1.15 we get 11.5$
Now multiplying 11.5 by 1.15 again we get 13.225 which is the same as increasing 10 by 32%.
So the answer you got is correct.
If the answer choices aren't incorrect, you would be best served to choose the closest possible answer choice i.e. A and move on.
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