What is 17.7777778 written as a fraction?

To convert the decimal 17.7777778 to a fraction, we can represent it as 17.7777778 = 17 + 0.7777778. The decimal part 0.7777778 can be expressed as 7 repeating, so it can be written as 7/9. Therefore, 17.7777778 can be written as the mixed number 17 7/9 or the improper fraction 161/9.