If the price of rice is raised by 20%, then by what percentage should a person reduce his consumption of rice so that his expenditure remains the same? (correct to one decimal place)

16.7%

Price ∝ \(\frac{1}{Consumption}\)

20% = \(\frac{1}{5}\)

Ratio of ,            Initial    :     New

Price                      5       :      6

Consumption           6      :      5

Reduced percentage of Consumption = \(\frac{1}{6}\)  × 100 = 16.7%