Dan bought a computer during a 45% off sale for $772.20 including an 8%saled tax

To find 45% of 772.20 you would multiply 772.20 by. 45 which would equal 347.49 dollars. Subtract 772.20 by 347.49. Take that answer (424.71) and multiply it by. 08. You then subtract 33.98 from 424.71. Your answer is that Dan spent $390.73 on the computer.