Step 1:
The first step to converting 1961318173.9899 to a fraction is to re-write 1961318173.9899 in the form p/q where p and q are both positive integers. To start with, 1961318173.9899 can be written as simply 1961318173.9899/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 1961318173.9899, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 1961318173.9899/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 1961318173.9899/1 each by 10000:
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 1961318173.9899 as a fraction:
1961318173/1 / 1