Step 1:
The first step to converting 61866.908621958 to a fraction is to re-write 61866.908621958 in the form p/q where p and q are both positive integers. To start with, 61866.908621958 can be written as simply 61866.908621958/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 61866.908621958, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 61866.908621958/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 61866.908621958/1 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 61866.908621958 as a fraction:
618669/10 / 1