Step 1:
The first step to converting 80123.87590136 to a fraction is to re-write 80123.87590136 in the form p/q where p and q are both positive integers. To start with, 80123.87590136 can be written as simply 80123.87590136/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 80123.87590136, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 80123.87590136/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 80123.87590136/1 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 80123.87590136 as a fraction:
640991/8 / 1