The price of rice goes up by 25%. By how much should the consumption of rice be reduced to keep the total expenditure on rice at the previous level?

A 25%

B 20%

C 33.3%

D 24%

Correct Answer: Option B

At 25% rise, current price=100+25=125 tk in 125 taka there is 25 tk in 1 taka there is 25/125 tk in 100 taka there is 25 x 100/125 tk=20%