Step 1:
The first step to converting 4243.398750003 to a fraction is to re-write 4243.398750003 in the form p/q where p and q are both positive integers. To start with, 4243.398750003 can be written as simply 4243.398750003/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 4243.398750003, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 4243.398750003/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 4243.398750003/1 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 4243.398750003 as a fraction:
21217/5 / 1