The tax on a commodity is diminished by 16% and its consumption increased by 15%. The effect on revenue is?	Select
A) 2 %  B) 3.8 %  C) 3.4 %  D) 3.6 %  E) 1 %

Rationale: 100 * 100 = 10000 84 * 115 = 9660 - - - - - - - - - - - 10000 - - - - - - - - - - - 340 100 - - - - - - - - - - - ? = > 3.4 % decrease answer : c
Answer: C