the product of x and y is a constant. if the value of x is increased by 60 %, by what percentage must the value of y be decreased?
Pick:	A) 30 %	B) 32 %	C) 35 %	D) 37.5 %	E) 40 %
<gadget id="calculator">100 + 60</gadget>
<output>160</output>

<gadget id="calculator">100 / 160</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) * 100</gadget>
<output>75/2 = around 37.5</output>

<result>D</result>
the product of x and y is a constant. if the value of x is increased by 60 %, by what percentage must the value of y be decreased?
multiply(subtract(const_1, divide(const_100, add(const_100, 60))), const_100)
"x * y = constt . let x = y = 100 in beginning i . e . x * y = 100 * 100 = 10000 x ( 100 ) - - - becomes - - - > 1.6 x ( 120 ) i . e . 160 * new ' y ' = 10000 i . e . new ' y ' = 10000 / 160 = 62.5 i . e . y decreases from 100 to 62.5 i . e . decrease of 37.5 % answer : option d"