The tax on a commodity is diminished by 28% but its consumption is increased by 12%. Find the decrease percent in the revenue derived from it?  Choose the correct choice from the following choices:
A) 18%  B) 19%  C) 32%  D) 12%  E) 52%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   72 * 112= 
<gadget id="calculator">72 * 112</gadget>
<output>8_064</output>
8064   10000------- 1936   100 ------- ?= 19.36%   Answer:19%
<result>B</result>
The tax on a commodity is diminished by 28% but its consumption is increased by 12%. Find the decrease percent in the revenue derived from it?