What is 0.555555556 as a fraction?

0.555555556 as a fraction can be expressed as 5/9. To convert a decimal to a fraction, you can set up an equation where the decimal is equal to x divided by 1 (0.555555556 = x/1). Then, you can multiply both sides of the equation by 9 to get rid of the decimal, resulting in x = 5. Therefore, the fraction equivalent is 5/9.