The price of petrol is increased by 28%. By what percentage should the consumption be decreased by the consumer, if the expenditure on petrol remains unchanged?
(Correct to 2 decimal places)
Answer & explanation
Correct answer: option 2
The price of petrol is increased by 28%
Price is inversely Propotional to Expenditure .
Original : New
Price 100 : 128
Expenditure 128 : 100
Required Percentage = \(\frac{128-100}{128}\) × 100 = 21.875%
= 21.88%