Step 1:
The first step to converting 90099942.4389 to a fraction is to re-write 90099942.4389 in the form p/q where p and q are both positive integers. To start with, 90099942.4389 can be written as simply 90099942.4389/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 90099942.4389, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 90099942.4389/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 90099942.4389/1 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 90099942.4389 as a fraction:
90099942/1 / 1