p = 1 6 {\displaystyle p={\frac {1}{6}}}
p 1 − p = 1 6 6 6 − 1 6 = 1 6 5 6 = 1 5 {\displaystyle {\frac {p}{1-p}}={\frac {\frac {1}{6}}{{\frac {6}{6}}-{\frac {1}{6}}}}={\frac {\frac {1}{6}}{\frac {5}{6}}}={\frac {1}{5}}}
