Question
If the price of rice has increased from Rs 40 per kg to
Rs. 60 per kg, by how much percent a person has to decrease his consumption so that his expenditure remains same.  ÂSolution
Let the consumption be 100 kg. When price is Rs.40 per kg, then the expenditure = 100 x 40 = Rs. 4,000. At Rs.60 per kg, the 60 x consumption = 4000 Consumption = 4000/60 = 66.67 kg. Required decreased % = 100 – 66.67 = 33.33%
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