Step 1:
The first step to converting 90811.213991913 to a fraction is to re-write 90811.213991913 in the form p/q where p and q are both positive integers. To start with, 90811.213991913 can be written as simply 90811.213991913/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 90811.213991913, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 90811.213991913/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 90811.213991913/1 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 90811.213991913 as a fraction:
363245/4 / 1