The tax on a commodity is diminished by 16% and its consumption increased by 15%. The effect on revenue is?	Select:	A) 2%	B) 3.8%	C) 3.4%	D) 3.6%	E) 1%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   84 * 115= 
<gadget id="calculator">84 * 115</gadget>
<output>9_660</output>
9660   -----------   10000-----------340   100-----------?=&gt; 3.4% decrease   Answer: 3.4%
<result>C</result>
The tax on a commodity is diminished by 16% and its consumption increased by 15%. The effect on revenue is?