Here is the question, I am self teaching myself also.

A 104 inch tablecloth covers a 7 foot long table. how many inches of cloth hang over the front, assuming the table is centered in the tablecloth?

I put the answer as 20 when the answer should be 10

Here is how I got 20. I divided 104 by 12 the 12 is for 12 inch = 1 foot. I got 8 remainder 8. So I did this as 8 feet 8 inches. Then I did 104 - 84 = 20. I got 84 because for the table size in inches. So that how I go 20. How is the answer 10. I checked the back of the book after I finished and it say's 10.

What's the solution, does it have to do anything with the word "centered".