BTGmoderatorLU wrote:The price of onion increases by 25%, by what percent should a housewife reduces the consumption that expenditure on onions can be same as before?
A. 14.28
B. 16.66
C. 20
D. 25
E. 33.33
Let the original price per onion = $4, implying that the price per onion after a 25% increase = $4 + (25% of 4) = 4 + 1 = $5.
Let the total amount spent in each case = the LCM of the two prices = $20.
Number of onions purchased at the original $4 price = (total spent)/(price per onion) = 20/4 = 5.
Number of onions purchased at the increased $5 price = (total spent)/(price per onion) = 20/5 = 4.
Since the consumption decreases from 5 onions to 4 onions, the percent decrease in the consumption = Difference/Original * 100 = 1/5 * 100 = 20.
The correct answer is
C.
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