Question

9.
Price of kerosene oil rose by 25%. By how much percent must a person reduce
his consumption so that his expenditure on it does not increase?​

Answer 1

Answer:

20 %

Step-by-step explanation:

Step-by-step explanation:

Let the consumption of sugar originally be 1 unit and let its cost be Rs 100.

Then, the new cost will be Rs125.

Now, Rs 125 will yeild ( 1/125 × 100 ) unit= 4/5 unit of sugar.

Then, reduction in consumption = ( 1 - 4/5 ) = 1/5 unit

Therefore, reduction % in consumption = ( 1/5 × 100 )%

= 20 %

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