Question

The price of cooking oil has increased by 25% the percent of reduction that a family should effect in the use of cooking so as not to increase the expenditure on this account is

Answer 1

20% reduction....hope it helpd

Answer 2

The percentage reduction in consumption of oil is 20%.

Step-by-step explanation:

Let us assume that x kg of oil was used previously by the family which costs R rupees.

Now, the price of oil has increased by 25%.

So, the new price of the x kg of oil will be $R(1 + \frac{25}{100}) = 1.25R$

Now, the present cost is 1.25R for x kg of oil.

Therefore, the present cost is R for $\frac{x \times R}{1.25R} = 0.8x.$ kg of oil.

So, to maintain the same expenditure the consumption of oil has to reduce from x kg to 0.8x kg.

So, the reduction in consumption is by $\frac{x - 0.8x}{x} \times 100\% = 20\%$. (Answer)