John makes $40 a week from his job. He earns a raise andnow makes $70 a week. What is the % increase?  Choose the correct choice from the following answers
A) 16 % B) 16.66 % C) 17.9 % D) 18.12 % E) 75 %

Rationale: "increase = ( 30 / 40 ) * 100 = ( 3 / 4 ) * 100 = 75 % . e"
Answer: E