The perimter of a rectangle is calculated as,
[tex]P=\frac{1}{2}(l+w)_{}[/tex]Here,
[tex]\begin{gathered} l=\frac{7}{8} \\ w=\frac{3}{8} \end{gathered}[/tex]So, we have,
[tex]P=\frac{1}{2}(\frac{7}{8}+\frac{3}{8})=\frac{1}{2}(\frac{10}{8})=\frac{1}{2}(\frac{5}{4})=\frac{5}{8}_{}[/tex]