Step 1:
The first step to converting 780575413.2157 to a fraction is to re-write 780575413.2157 in the form p/q where p and q are both positive integers. To start with, 780575413.2157 can be written as simply 780575413.2157/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 780575413.2157, which in this case is 4. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 780575413.2157/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 780575413.2157/1 each by 10000:
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 780575413.2157 as a fraction:
780575413/1 / 1