John makes $60 a week from his job. He earns a raise and now makes $100 a week. What is the % increase?
Pick:  A) 16 %  B) 66.67 %  C) 17 %  D) 17.61 %  E) 17.56 %

Rationale: "increase = ( 40 / 60 ) * 100 = ( 4 / 6 ) * 100 = 66.67 % . b"
Answer: B