Step 1:
The first step to converting 86357.20603561 to a fraction is to re-write 86357.20603561 in the form p/q where p and q are both positive integers. To start with, 86357.20603561 can be written as simply 86357.20603561/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 86357.20603561, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 86357.20603561/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 86357.20603561/1 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 86357.20603561 as a fraction:
345429/4 / 1