Step 1:
The first step to converting 621288.69298493 to a fraction is to re-write 621288.69298493 in the form p/q where p and q are both positive integers. To start with, 621288.69298493 can be written as simply 621288.69298493/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 621288.69298493, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 621288.69298493/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 621288.69298493/1 each by 100000000:
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 621288.69298493 as a fraction:
621289/1 / 1