Rice is now being sold at Taka 20 a kg. During last month its rate was Taka 16 per kg. By how much percent should a family reduce its consumption so as to keep the expenditure fixed?
সমাধান
সঠিক উত্তর: Option A
Expenditure must be fixed in percentage
= (16/20) X 100= 80
.:. (100-80) = 20% is reduced