Step 1:
The first step to converting 51491.816888369 to a fraction is to re-write 51491.816888369 in the form p/q where p and q are both positive integers. To start with, 51491.816888369 can be written as simply 51491.816888369/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 51491.816888369, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 51491.816888369/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 51491.816888369/1 each by 1000000000:
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 51491.816888369 as a fraction:
257459/5 / 1