The price of cooking oil has increased by 25%. The percentage of reduction that a family should effect in the use of cooking oil so as not to increase the expenditure on this account is:
20%
The percentage of reduction is calculated with the new price of the oil.
Let the price of cooking oil = Rs. 100
Increase in price =25% of 100 = 25
∴ Increased price = 100 +25=125
Required percentage of Reduction
Change in priceIncreased price×100
=25125×100=20%