The tax on a commodity is diminished by 30% but its consumption is increased by 15%. Find the decrease percent in the revenue derived from it?
Pick one
A) 20% B) 18% C) 15% D) 12% E) 14%
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   70 * 115= 
<gadget id="calculator">70 * 115</gadget>
<output>8_050</output>
8050   10000------- 1950   100 ------- ?= 20%   20%NSWER:20%
<result>A</result>
The tax on a commodity is diminished by 30% but its consumption is increased by 15%. Find the decrease percent in the revenue derived from it?