The tax on a commodity is diminished by 20% but its consumption is increased by 15%. Find the decrease percent in the revenue derived from it? Choose the most appropriate option:
A) 12%
B) 14%
C) 16%
D) 20%
E) 8%
8%xplanation:   100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   80 * 115= 
<gadget id="calculator">80 * 115</gadget>
<output>9_200</output>
9200   10000------- 800   100 ------- ?= 8%   8%)
<result>E</result>
The tax on a commodity is diminished by 20% but its consumption is increased by 15%. Find the decrease percent in the revenue derived from it?