[tex]\bf \cfrac{\frac{3}{5}}{\frac{3}{8}}\cdot \cfrac{miles}{hour}\implies \cfrac{\underline{3}}{5}\cdot \cfrac{8}{\underline{3}}\cdot \cfrac{miles}{hour}\implies \cfrac{8}{5}\cfrac{miles}{hour}\implies 1.6\frac{miles}{hour}[/tex]
one may note that, you never posted the equations list, but anyway, that'd be the rate in simplified form.
