Answer:
4 percent.
Explanation:
To solve this problem we have to find the percent $0.12 is of $2.79.
0.12 = x * 2.79
0.12 divided by 2.79 = 0.04301075268
We have to round to the nearest percent, so that's 0.04, or 4 percent.
The tax rate at the airport is 4 percent.