The tax on a commodity is diminished by 25% and its consumption increased by 13%. The effect on revenue is?
Answers: A) 18 B) 16 C) 10 D) 15 E) 14
100 * 100= 
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>
10000   75 * 113= 
<gadget id="calculator">75 * 113</gadget>
<output>8_475</output>
8475   -----------   10000-----------1525   100-----------?=&gt; 15% decrease   Answer:15
<result>D</result>
The tax on a commodity is diminished by 25% and its consumption increased by 13%. The effect on revenue is?