If the price of petrol increases by 32, by how much must a user cut down his consumption so that his expenditure on petrol remains constant?	Choose the correct choice from the following answers:  A) 25 %  B) 20 %  C) 24.2 %  D) 33.33 %  E) none of these

Rationale: explanation : let us assume before increase the petrol will be rs . 100 . after increase it will be rs ( 100 + 32 ) i . e 132 . now , his consumption should be reduced to : - = ( 132 − 100 ) / 132 ∗ 100 . hence , the consumption should be reduced to 24.2 % . answer : c
Answer: C