A certain telescope increases the visual range at a particular location from 70 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ?  Choose the correct choice.
A) 30 % B) 33 1 / 2 % C) 40 % D) 60 % E) 114.28 %

Rationale: "original visual range = 70 km new visual range = 150 km percent increase in the visual range by using the telescope = ( 150 - 70 ) / 70 * 100 % = 8 / 7 * 100 % = 114.28 % answer e"
Answer: E