A certain telescope increases the visual range at a particular location from 90 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ? Choose the most appropriate option: A) 30% B) 33 1/2% C) 40% D) 60% E) 66 2/3%
Original visual range = 90 km   New visual range = 150 km   Percent increase in the visual range by using the telescope   = (150-90)/90 * 100%   = 2/3 * 100%   = 66.67 %   Answer 66 2/3%
<result>E</result>
A certain telescope increases the visual range at a particular location from 90 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ?