The tax on a commodity is diminished by 18% and its consumption increased by 15%. The effect on revenue is?  Choose the correct choice from the following options.
A) 2%
B) 8.7%
C) 5.7%
D) 6.7%
E) 1%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   82 * 115= 
<gadget id="calculator">82 * 115</gadget>
<output>9_430</output>
9430   -----------   10000-----------570   100-----------?=&gt; 5.7% decrease   Answer: 5.7%
<result>C</result>
The tax on a commodity is diminished by 18% and its consumption increased by 15%. The effect on revenue is?