If the price of sugar rises from Rs. 2 per kg to Rs. 5 per kg, a person, to have no increase in the expenditure on sugar, will have to reduce his consumption of sugar by  Choices:
A) 15%  B) 20%  C) 25%  D) 30%  E) 60%
Sol.   Let the original consumption = 100 kg and new consumption = x kg.   So, 100 x 2 = x × 5 = x = 40 kg.   ∴ Reduction in consumption = 60%.   Answer 60%
<result>E</result>
If the price of sugar rises from Rs. 2 per kg to Rs. 5 per kg, a person, to have no increase in the expenditure on sugar, will have to reduce his consumption of sugar by