Step 1:
The first step to converting 81631148.639452 to a fraction is to re-write 81631148.639452 in the form p/q where p and q are both positive integers. To start with, 81631148.639452 can be written as simply 81631148.639452/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 81631148.639452, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 81631148.639452/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 81631148.639452/1 each by 1000000:
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 81631148.639452 as a fraction:
81631148/1 / 1