daal is now being sold at rate Rs.20 a kg.During last month its rate was Rs 16 per kg.By How reduce percent should a family its consumption so as to keep the expenditure fixed? Pick one: A) 10% B) 20% C) 30% D) 40% E) 50%
Last month rate= 16 per kg   this month rate = 20 per kg   if 20=100% then 16= ?   therefore %= (16 * 100)/20= 
<gadget id="calculator">(16 * 100)/20</gadget>
<output>80</output>
80%   to reduce consumption   100-80= 
<gadget id="calculator">  100-80</gadget>
<output>20</output>
20%   ANSWER:20%
<result>B</result>
daal is now being sold at rate Rs.20 a kg.During last month its rate was Rs 16 per kg.By How reduce percent should a family its consumption so as to keep the expenditure fixed?