Step 1:
The first step to converting 40489.990505312 to a fraction is to re-write 40489.990505312 in the form p/q where p and q are both positive integers. To start with, 40489.990505312 can be written as simply 40489.990505312/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 40489.990505312, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 40489.990505312/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 40489.990505312/1 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 40489.990505312 as a fraction:
40490/1 / 1