Brody had his computer repaired at Store A. His bill was: Initial Repair Cost = $1,200 Sales Tax of 6 percent = $72.00 Gratuity of 15 percent Explain how you would calculate the gratuity for the services provided.

Gratuity of $180 I would multiply the actual repair cost without including tax to determine the gratuity. So just multiply $1200 by 0.15 getting $180. As an suggestion, calculating 15% in your head is actually quite simple. What you do is calculate 10%, divide that in half, then add together. So for the $1200 example, you have 1200/10 = 120 half of 120 is 60 120 + 60 = 180 So you have a top of $180.