Question

In the new budget,the price of petrol has risen by 10% . By how much percent must a motorist reduce the consumption of petrol so that his expenditure on it does not increase?​

Answer 1

We have,

Let the original price of petrol =Rs100

Then,

The price after 10% increase=100+10%of100

=100+10=Rs110

Price after increase =110

{110(110−100)}×100

=11100

=9.09%

A motorist should reduce the consumption of petro by 9.09%

Hence, this is the answer.

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