sqrt (27/75) = sqrt((3*3*3) /(3*5*5) ) = sqrt (( 3*3)/(5*5) ) = 3/5
sqrt(x^4) = x^2
sqrt(1/y^2) = 1/y
result : 3/5 * x^2/y
sqrt (27/75) = sqrt((3*3*3) /(3*5*5) ) = sqrt (( 3*3)/(5*5) ) = 3/5
sqrt(x^4) = x^2
sqrt(1/y^2) = 1/y
result : 3/5 * x^2/y