A reduction in the price of petrol by 10% enables a motorist to buy 5 gallons more for $200. Find the original price of petrol?  Choose the most appropriate option:
A) $ 11
B) $ 5
C) $ 45
D) $ 400
E) $ 4.4

Rationale: "price decreased by 10 % , so 9 / 10 times , which means that original gallons bought increased 10 / 9 times . since this increase equals to 5 gallons then 45 gallons were bought originally ( 45 * 10 / 9 = 50 - - > increase 5 gallons ) . hence original price was 200 / 45 = $ 4.4 answer : e ."
Answer: E