John makes $50 a week from his job. He earns a raise and now makes $80 a week. What is the % increase?	Choose the correct choice
A) 16 %  B) 16.66 %  C) 17.9 %  D) 18.12 %  E) 60 %

Rationale: "increase = ( 30 / 50 ) * 100 = ( 3 / 5 ) * 100 = 60 % . e"
Answer: E