The tax on a commodity is diminished by 25% and its consumption increased by 13%. The effect on revenue is?  Pick one:
A) 18
B) 16
C) 10
D) 15
E) 14

Rationale: "100 * 100 = 10000 75 * 113 = 8475 - - - - - - - - - - - 10000 - - - - - - - - - - - 1525 100 - - - - - - - - - - - ? = > 15 % decrease answer : d"
Answer: D