Find a Counterexample to Show That the Following Statement Is $\text { For all nonzero real numbers } a , b , c \text { and } d , \frac { a } { b } + \frac { c } { d } = \frac { a + c } { b + d } \text {. }$

Essay

Find a counterexample to show that the following statement is false: $\text { For all nonzero real numbers } a , b , c \text { and } d , \frac { a } { b } + \frac { c } { d } = \frac { a + c } { b + d } \text {. }$