p(7) = \frac{2 \cdot 7^0 + 3 \cdot 7^1 + 5 \cdot 7^2}{11 \cdot 7^1 + 13 \cdot 7^2} = \frac{2 + 21 + 245}{77 + 637} = \frac{268}{714} = 0.37535