Step 1:
The first step to converting 86487.796387155 to a fraction is to re-write 86487.796387155 in the form p/q where p and q are both positive integers. To start with, 86487.796387155 can be written as simply 86487.796387155/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 86487.796387155, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 86487.796387155/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 86487.796387155/1 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 86487.796387155 as a fraction:
345951/4 / 1