Step 1:
The first step to converting 161641.6459 to a fraction is to re-write 161641.6459 in the form p/q where p and q are both positive integers. To start with, 161641.6459 can be written as simply 161641.6459/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 161641.6459, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 161641.6459/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 161641.6459/1 each by 10000:
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 161641.6459 as a fraction:
323283/2 / 1