[tex]\\ \tt\hookrightarrow \sqrt{\dfrac{1}{64}}=\dfrac{\sqrt{1}}{\sqrt{64}}=\dfrac{1}{8}=0.125[/tex]
[tex]\\ \tt\hookrightarrow \dfrac{1}{5}=0.2[/tex]
[tex]\\ \tt\hookrightarrow 0.2222\approx 0.3[/tex]
So the order is
[tex]\\ \tt\hookrightarrow 0.125<0.2<0.222[/tex]
