How to turn a decimal that only has one number repeating into a fraction?

7x+8y=-18, 4x-9y=-3 solve the system of equations

What is 20+(5 x 2/5 )+ 3 show your work

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?