Step 1:
The first step to converting 917.90310400985 to a fraction is to re-write 917.90310400985 in the form p/q where p and q are both positive integers. To start with, 917.90310400985 can be written as simply 917.90310400985/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 917.90310400985, which in this case is 11. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 917.90310400985/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 917.90310400985/1 each by 100000000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 917.90310400985 as a fraction:
28455/31 / 1