You would multiply the numbers together. So.....175 x 0.5 = 87.5. The additional price you had to pay was 87.5 dollars. You add this to the 175 dollars you initially need to pay. This gives you 262.5. An easy way to get the full price right away is to go 175 x 1.5. This means to multiply it by itself and the 50 percent. You get the same answer.