Marty booked a hotel room that cost $225.00. sales tax on the room was 12%. what was the total cost of the hotel including tax?

First, find the tax
tax = 12% × cost
tax = 12/100 × 225
tax = 0.12 × 225
tax = 27
The tax was $27

Second, add the cost and tax together to find the total cost
total cost = cost + tax
total cost = 225 + 27
total cost = 252

The total cost was $252.00