Step 1:
The first step to converting 213420.58630576 to a fraction is to re-write 213420.58630576 in the form p/q where p and q are both positive integers. To start with, 213420.58630576 can be written as simply 213420.58630576/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 213420.58630576, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 213420.58630576/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 213420.58630576/1 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 213420.58630576 as a fraction:
426841/2 / 1