$$\begin{array}{rcl} x\in (0,1) & \Rightarrow & y=\frac{1}{x}\in (1,\infty) \\ \\ & \Rightarrow & \left\lfloor y\right\rfloor = \left\lfloor\frac{1}{x}\right\rfloor \in[1,\infty) \\ \\ & \Rightarrow & \frac12<\frac{\left\lfloor y\right\rfloor}{y}=x\cdot \left\lfloor \frac1x\right\rfloor \\ \\ & \Rightarrow & 1<2\cdot\frac{\left\lfloor y\right\rfloor}{y}=2\cdot x\cdot \left\lfloor \frac1x\right\rfloor\end{array}$$