The tax on a commodity is diminished by 40% but its consumption is increased by 25%. Find the decrease percent in the revenue derived from it? Choices
A) 18 %
B) 72 %
C) 25 %
D) 12 %
E) 52 %

Rationale: "100 * 100 = 10000 60 * 125 = 7500 10000 - - - - - - - 2500 100 - - - - - - - ? = 25 % answer : c"
Answer: C