The way you turn 2.161616 in to a mixed number is that since the 2 is on the left form the decimal point 2 will be the whole number and since 161616 is on the left of the decimal point then the fraction would be 161616/1,000,000 so the mixed number is 2 and 161616/1,000,000. Since there is a whole number to the left of the decimal point then we can't write it as a fraction, only it can be a mixed number. That's how you write 2.161616 as a mixed number and not a fraction.