$\mathrm{What} frac\mathrm{tion} \mathrm{of} \mathrm{the} \mathrm{given} \mathrm{circle} \mathrm{is} \mathrm{coloured} Blue?$

$\begin{array}{rcl} & & Given:\\ & & A partially coloured Circle.\\ & & To calculate:\\ & & what fraction of the circle is coloured Blue.\\ & & Calculations:\\ & =& >As it is evident from the figure that 2 out of 4 parts are coloured Blue.\\ & =& >\frac{2}{4} is the answer and \frac{2}{4} can be also written as \frac{4}{8}.\\ & & Hence option D is correct.\end{array}$