In the figure ABCDEFGH is a regular octagon. What fraction of its area is shaded?

In the figure two rectangles $\mathrm{ABCD}$ and $\mathrm{DEBG}$, each of length $7 \mathrm{cm}$ and width $3 \mathrm{cm}$. The area of the shaded region, in ${\mathrm{cm}}^2$ is approximately:

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What is the difference between average production (in lakh tonnes) of paper of the six companies in $2008$ and average production of the same companies in $2007$?

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The percentage increase in production by company B from $2008$ to $2009$  is approximately

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Which of the four companies A, B, C and F has recorded the maximum percentage growth from $2007$ to $2008$?

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Production of company C in $2008$ and production of company F in $2007$ together is what percentage of production of company D in $2009$?