John makes $50 a week from his job. He earns a raise and now makes $60 a week. What is the % increase?  Choose one
A) 16 %	B) 16.66 %	C) 17.9 %	D) 18.12 %	E) 20 %

Rationale: "increase = ( 10 / 50 ) * 100 = ( 1 / 5 ) * 100 = 20 % . e"
Answer: E