A student multiplied a number by 3/5 instead of 5/3. What is the percentage error.  Choose the correct choice from the following choices.
A) 64 %  B) 65 %  C) 66 %  D) 67 %  E) none of these

Rationale: "explanation : let the number be x , then , 5 / 3 − 3 / 5 = 16 / 15 x error % = ( 16 / 15 x ∗ 3 / 5 ∗ 100 ) option a"
Answer: A