The tax on a commodity is diminished by 20% but its consumption is increased by 5%. Find the decrease percent in the revenue derived from it? Choose the most appropriate option
A) 12% B) 14% C) 16% D) 20% E) 22%
Explanation:   100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   80 * 105= 
<gadget id="calculator">80 * 105</gadget>
<output>8_400</output>
8400   10000------- 1600   100 ------- ?= 16%   16%)
<result>C</result>
The tax on a commodity is diminished by 20% but its consumption is increased by 5%. Find the decrease percent in the revenue derived from it?