Raphael paid 636 for camera during a 60% off sale with the cameras regular price

60% off means u paid 40%

40% of the regular price = 636
0.40x = 636
x = 636/0.40
x = 1590 <==

Your question needs some rewording.  How does this sound?  "Raphael paid $636 for camera during a 60% off sale.  The camera's regular price is x.  Find this price."

If the price is 60% lower than usual, Raphael is paying only (100% - 60%), or 40%, for the camera.

Thus, 0.40x = $636.  Divide both sides of this eq'n by 0.40 to find the original price of the camera.

x = $636/0.40 = ?