Length of the rectangular tabletop = 4 3/4 feet
= 19/4 feet
Let us assume the width of the rectangular table = x feet
Area of the rectangular tabletop = 11 7/8 square feet
= 95/8 square feet
Then
Area = length * width
95/8 = 19x/4
19x * 8 = 95 * 4
x = (95 * 4)/(19 * 8)
= 5/2 feet
= 2 1/2 feet
So the width of the rectangular tabletop is 2 1/2 feet. i hope the procedure for finding the solution is easy enough for you to understand.
