John makes $50 a week from his job. He earns a raise andnow makes $90 a week. What is the % increase?\nOptions:\n(A) 15%\n(B) 16.66%\n(C) 17.8%\n(D) 80%\n(E) 21%
Step-by-step reasoning process below:
(D)
Increase = (40/50)*100 = (4/5)*100 = 80%.

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So, the answer is (D)