Let the missing angle be x.
The total angle at a point is 360degrees.
Hence 30% of 360deg
[tex]\frac{30}{100}\times360^o=\frac{30\times360}{100}=3\times36=108^o[/tex]
[tex]\frac{162}{360}\times100=\frac{162\times100}{360}=\frac{162\times10}{36}=\frac{18\times10}{4}=\frac{90}{2}=45percent[/tex]
