If A's salary is 20% less than B's salary, by how much percent is B's salary more than A's?  Choose the correct option:
A) 5 %
B) 10 %
C) 15 %
D) 25 %
E) none

Rationale: solution required percentage ‹ = › [ 20 / ( 100 - 20 ) x 100 ] % ‹ = › 25 % answer d
Answer: D