• question_answer If the price of a commodity be raised by 40%, by how much per cent must a householder reduce his consumption of that commodity, so as not to increase his expenditure? A) $28\,\,\frac{3}{7}%$                B) $28\,\,\frac{4}{7}%$C) $28\,\,\frac{7}{4}%$                D) $28\,\,\frac{7}{3}%$

Reduced per cent consumption $=\frac{40}{140}\times 100$ $=28\frac{4}{7}%$