The tax on a commodity is diminished by 20% but its consumption is increased by 10%. Find the decrease percent in the revenue derived from it? Choose the most appropriate option:	A) 20%	B) 18%	C) 15%	D) 12%	E) 14%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   80 * 110= 
<gadget id="calculator">80 * 110</gadget>
<output>8_800</output>
8800   10000------- 1200   100 ------- ?= 12%   ANSWER:12%
<result>D</result>
The tax on a commodity is diminished by 20% but its consumption is increased by 10%. Find the decrease percent in the revenue derived from it?