Step 1:
The first step to converting 437720.9710209 to a fraction is to re-write 437720.9710209 in the form p/q where p and q are both positive integers. To start with, 437720.9710209 can be written as simply 437720.9710209/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 437720.9710209, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 437720.9710209/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 437720.9710209/1 each by 10000000:
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 437720.9710209 as a fraction:
437721/1 / 1