Now, if the customers left 8.23 extra, based on a percentage of the cost of the meal, namely, the 8.23 is a percent of 49.28, then
if we take 49.28 to be the 100%, how much of a percentage is 8.23?
The density of aluminum is known to be 2.70 g/cm3
If you mean
3/15+12/6
the answer is 2.2