Step 1:
The first step to converting 908.6478460407 to a fraction is to re-write 908.6478460407 in the form p/q where p and q are both positive integers. To start with, 908.6478460407 can be written as simply 908.6478460407/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 908.6478460407, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 908.6478460407/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 908.6478460407/1 each by 10000000000:
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 908.6478460407 as a fraction:
15447/17 / 1