Premier says Qld will open borders when 80% are double jabbed, page-67

[(1-0.1)/(1-0.7)]/(0.1/0.7) is the calculation

https://www.google.com.au/amp/s/www.timesofisrael.com/among-older-israelis-serious-covid-rate-six-times-higher-if-unvaccinated/amp/

so you are comparing 62% of the total population that is vaccinated with 60% of over 50 deaths being vaccinated (40% unvaccinated) . They are not the same thing. The article below implies an over 50 vaccination rate of around 87% (unvaccinated 13%)

Basic maths tells you that the death rate amongst the unvaccinated is 4.4 times higher.

(0.4/0.13)/(0.6/0.87)