John makes $60 a week from his job. He earns a raise andnow makes $84 a week. What is the % increase?  Choose one.
A) 16.12 % B) 16.66 % C) 16.56 % D) 40 % E) 18.1 %

Rationale: "increase = ( 24 / 60 ) * 100 = ( 4 / 10 ) * 100 = 40 % . d"
Answer: D