If (x/y+1)=4, then what is the value of ((x^2+y^2)/(y^2)) ?

If $(\frac{x}{y}+1)=4$,

then what is the value of $(\frac{x^2+y^2}{y^2})$ = ?

Put the value of x = 3 and y = 1

$(\frac{x^2+y^2}{y^2})$ = $(\frac{3^2+1^2}{1^2})$  = 10