What was the cameras regular price if she paid 644 for the camera durning a 60% off

The original price is 1030.4. All you have to do is make the 60 a decimal (move the percentage sign twice to the left to make it .60) and then multiply it by the price (644) so your equation should be .60*644. That will give you an answer of 386.4 which was the amount they took off because of the sale. You now have to add the 386.4 to the 644 to find the original price which is 1030.4.