A certain telescope increases the visual range at a particular location from 50 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ? Choose the correct option.
A) 30 %	B) 33 1 / 2 %	C) 40 %	D) 60 %	E) 200 %

Rationale: original visual range = 50 km new visual range = 150 km percent increase in the visual range by using the telescope = ( 150 - 50 ) / 50 * 100 % = 2 * 100 % = 200 % answer e
Answer: E