Step 1:
The first step to converting 545406.1620516 to a fraction is to re-write 545406.1620516 in the form p/q where p and q are both positive integers. To start with, 545406.1620516 can be written as simply 545406.1620516/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 545406.1620516, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 545406.1620516/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 545406.1620516/1 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 545406.1620516 as a fraction:
545406/1 / 1