The conversion of degree to radian is done by;
[tex]1^o\cong\frac{\pi}{180}rad[/tex]Thus, 212 degrees is;
[tex]\begin{gathered} 212^o\cong(212\times\frac{\pi}{180})rad \\ =3.70009801423 \end{gathered}[/tex]The conversion in fraction is;
[tex]\begin{gathered} \frac{212\pi}{180} \\ =\frac{53\pi}{45} \end{gathered}[/tex]