What is 6.66666666667 as a fraction?

To convert 6.66666666667 to a fraction, we can first write it as 6.6 recurring. This can be represented as 6.6 with a bar over the 6 to indicate the recurring decimal. To convert this to a fraction, we can set x = 6.66666666667 and then subtract the non-recurring part to get 10x - x = 66. This simplifies to 9x = 66, so x = 66/9. Therefore, 6.66666666667 is equivalent to the fraction 66/9, which simplifies to 22/3.