John makes $50 a week from his job. He earns a raise andnow makes $75 a week. What is the % increase?
Answers
A) 15 % B) 16.66 % C) 50 % D) 19 % E) 21 %

Rationale: "increase = ( 25 / 50 ) * 100 = ( 1 / 2 ) * 100 = 50 % . c"
Answer: C