Step 1:
The first step to converting 9852590419.4878 to a fraction is to re-write 9852590419.4878 in the form p/q where p and q are both positive integers. To start with, 9852590419.4878 can be written as simply 9852590419.4878/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 9852590419.4878, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 9852590419.4878/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 9852590419.4878/1 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 9852590419.4878 as a fraction:
9852590419/1 / 1