the product of x and y is a constant . if the value of x is increased by 50 % , by what percentage must the value of y be decreased ?
"product of x and y = xy if the value of x is increased by 50 % , value of y needs to be = xy / ( 1.5 x ) = 2 / 3 y decrease in value of y = y - 2 / 3 y = 1 / 3 y % decrease in value of y = ( 1 / 3 y ) / y * 100 % = 33 1 ⁄ 3 % answer c"
multiply(subtract(const_1, divide(const_100, add(const_100, 50))), const_100)