Step 1:
The first step to converting 3453.9478775623 to a fraction is to re-write 3453.9478775623 in the form p/q where p and q are both positive integers. To start with, 3453.9478775623 can be written as simply 3453.9478775623/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 3453.9478775623, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 3453.9478775623/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 3453.9478775623/1 each by 10000000000:
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 3453.9478775623 as a fraction:
65625/19 / 1