\( 5 \frac{1}{3} = \frac{5 \cdot 3 + 1}{3} = \frac{16}{3} \)
\( 1 \frac{2}{3} = \frac{1 \cdot 3 + 2}{3} = \frac{5}{3} \)
\( p = \frac{16}{3} - \frac{5}{3} = \frac{16 - 5}{3} = \frac{11}{3} \)
\( \frac{11}{3} = 3 \frac{2}{3} \)
Ответ: \( p = 3 \frac{2}{3} \).