Step 1:
The first step to converting 416821.4385724 to a fraction is to re-write 416821.4385724 in the form p/q where p and q are both positive integers. To start with, 416821.4385724 can be written as simply 416821.4385724/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 416821.4385724, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 416821.4385724/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 416821.4385724/1 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 416821.4385724 as a fraction:
833643/2 / 1