P.S. You can convert percentages to units by diving % by 100 for example 100% divided by 100 is equal to 1. And vice versa aka multiply units by 100 and you get %, for example 0.8 times 100 is 80%
It would take her 12 minutes because if you mutipy 2/3 by 3/2 then you get 1 (as in one mile) and then you have to do that to the other side too so then you multiply 8 by 2/3 and get 12