Solution:
Given that Lang walks
![(2)/(3)](https://img.qammunity.org/2023/formulas/mathematics/high-school/zeht2hdwlb899wfchg7j67j4mj43o3xc1c.png)
of a mile each day, this implies that
![1\text{ day }\Rightarrow\text{ }(2)/(3)\text{ mile}](https://img.qammunity.org/2023/formulas/mathematics/high-school/7e7wv6aquu6rt6aecii3j7nsw7l2h22vfm.png)
Thus, in order to evaluate how many days she has to walk a whole number of miles, we multiply through by 3.
Thus,
![\begin{gathered} 3(1\text{ day) }\Rightarrow3(\text{ }(2)/(3)\text{ mile)} \\ \text{thus, we have} \\ 3\text{ days }\Rightarrow\text{ 2 miles} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/high-school/yxbzmqcev3ct7cej905t96bhsxi2s84wpl.png)
This implies that in order to walk a whole number of miles, she has to walk 3 days.