The price of a mobile was increased by 25 percent. The new price was then decreased by 10 percent. A single increase of what percent is equivalent to these two successive changes?	Select.
A) 10 %  B) 15 %  C) 17.5 %  D) 25 %  E) 12.5 %

Rationale: "consider base price - $ 100 25 % increase = 1.25 * 100 = $ 125 then a 10 % decrease on new price = 0.9 * 125 = $ 112.5 so final price of radio - $ 112.5 therefore a 12.5 % increase correct option - e"
Answer: E