A certain telescope increases the visual range at a particular location from 80 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ? Pick
A) 30 % B) 33 1 / 2 % C) 40 % D) 60 % E) 87.5 %

Rationale: "original visual range = 80 km new visual range = 150 km percent increase in the visual range by using the telescope = ( 150 - 80 ) / 80 * 100 % = 7 / 8 * 100 % = 87.5 % answer e"
Answer: E