The price of milk increase by 25 %. If a
housewife wants to spend on milk the
same amount of money as before, how
much percent less milk she must get?
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Answer:
Net change = A + B + AB/100
Here A = 20% , B is unknown and net change = 0
Net change = 20 + B + 20B/100 = 0
=> 20 + B + B/5 = 0
=> 100 = -6B
B = -50/3 = -16.67%
Negative means decrease in consumption
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