what is rate of interest if principal.amount be 400,simple interest 180 and time 2year.	Choose the correct choice:
A) 10  B) 12.5  C) 25  D) 22.5  E) 14.5

Rationale: "s . i = ( p * r * t ) / 100 180 = 800 r / 100 r = 180 / 8 = 22.5 % answer d"
Answer: D