The quantities S and T are positive and are related by the equation S=K/T, where k is a constant. If the value of S increases by 30 percent, then the value of T decreases by what percent? Choose the most appropriate option
A) 25%  B) 33 ¹/₃%  C) 50%  D) 66 ²/₃%  E) 20%
We can assign numbers:   lets say S = 2, K = 6 (constant) and T = 3 (so that S=K/T)   Now increasing S by 30% gives S=5, K remains constant, so T = 2 (6/2=3)   decrease in T= 1, percent decrease in T = (1/5)*100= 
<gadget id="calculator">(1/5)*100</gadget>
<output>20</output>
20%   Answer 20%
<result>E</result>
The quantities S and T are positive and are related by the equation S=K/T, where k is a constant. If the value of S increases by 30 percent, then the value of T decreases by what percent?