\[\frac{x}{y} = 5 \Longrightarrow\]
\[x = 5y;\ \ \ \]
\[\frac{y}{x} = \frac{1}{5} = 0,2\]
\[\frac{x + y}{x} = 1 + \frac{y}{x} = 1 + 0,2 = 1,2.\]