Respuesta :

6 out of 9 bottles were used, therefore equal to 6/9 which as a percentage (just divide 6/9 on a calculator and multiply by 100 to get a percentage) you get 66 and 2/3%
6 out of 9 is equal to 6/9 and when you put that in a calculator and multiply by 100 you get 66.666667 with rounds to 66 2/3%