what is rate of interest if principal.amount be 400,simple interest 120 and time 2year.
Choose the correct choice from the following answers
A) 10
B) 12.5
C) 25
D) 12
E) 15

Rationale: "s . i = ( p * r * t ) / 100 120 = 800 r / 100 r = 120 / 8 = 15 % answer e"
Answer: E