Step 1:
The first step to converting 851205735.21699 to a fraction is to re-write 851205735.21699 in the form p/q where p and q are both positive integers. To start with, 851205735.21699 can be written as simply 851205735.21699/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 851205735.21699, which in this case is 5. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 851205735.21699/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 851205735.21699/1 each by 100000:
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 851205735.21699 as a fraction:
851205735/1 / 1