A core cutter of $130 \mathrm{~mm}$ height has inner and outer diameters of $100 \mathrm{~mm}$ and $106 \mathrm{~mm}$, respectively. The area ratio of the core cutter (in $\%,$ up to two decimal places) is

A core cutter of $130 \mathrm{~mm}$ height has inner and outer diameters of $100 \mathrm{~mm}$ and $106 \mathrm{~mm}$, respectively. The area ratio of the core cutter (in $\%,$ up to two decimal places) is

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