If the price of tea goes up by 28%, then by what percentage (correct to the nearest whole number) should its consumption be reduced so that the expenditure on it remains unchanged?

Correct option is A

Given:

Price of tea increased by 28%

Solution:

Let the price of tea be Rs. 100

Increased price = 100 + 28% of 100  = Rs. 128

Reduction on Rs 128 = Rs 28

Reduction on Re 1  =$$\frac{28}{128}$$​​

Reduction on Rs 100 $$= \frac{28}{128}\times 100 = 21.87\% \approx \bf 22\%$$