\[p < k;\ \ \ \ так\ как:\]
\[\frac{7}{9}p = \frac{k \cdot 35}{100}\]
\[\frac{7}{9}p = \frac{7 \cdot 5}{20 \cdot 5}k\]
\[\frac{7}{9}p = \frac{7}{20}k\]
\[\frac{7}{9} > \frac{7}{20} \Longrightarrow p < k.\]