The product of x and y is a constant. If the value of x is increased by 20%, by what percentage must the value of y be decreased? Choose the correct choice from the following answers.
A) 16.66 %	B) 33.33 %	C) 44.44 %	D) 55.55 %	E) 19.92 %

Rationale: "x * y = constt . let x = y = 100 in beginning i . e . x * y = 100 * 100 = 10000 x ( 100 ) - - - becomes - - - > 1.2 x ( 120 ) i . e . 120 * new ' y ' = 10000 i . e . new ' y ' = 10000 / 120 = 83.33 i . e . y decreases from 100 to 83.33 i . e . decrease of 16.66 % answer : option a"
Answer: A