Step 1:
The first step to converting 78364152168.9 to a fraction is to re-write 78364152168.9 in the form p/q where p and q are both positive integers. To start with, 78364152168.9 can be written as simply 78364152168.9/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 78364152168.9, which in this case is 1. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 78364152168.9/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 78364152168.9/1 each by 10:
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 78364152168.9 as a fraction:
78364152168/1 / 1