Present birth rate is 32 per thousand while death rate is 11 per thousand. What will be the percentage increase in the rate of population? Choose the correct option
A) 0.21%	B) 21%	C) 0.021%	D) 2.1%	E) None of these
birth rate=32/1000= 
<gadget id="calculator">32/1000</gadget>
<output>4/125 = around 0.032</output>
0.032   death rate=11/1000= 
<gadget id="calculator">11/1000</gadget>
<output>11/1_000 = around 0.011</output>
0.011   increase in population=0.032-0.011= 
<gadget id="calculator">0.032-0.011</gadget>
<output>0.021</output>
0.021=2.1%   ANSWER:2.1%
<result>D</result>
Present birth rate is 32 per thousand while death rate is 11 per thousand. What will be the percentage increase in the rate of population?