Step 1:
The first step to converting -778.3957391046 to a fraction is to re-write -778.3957391046 in the form p/q where p and q are both positive integers. To start with, -778.3957391046 can be written as simply -778.3957391046/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in -778.3957391046, which in this case is 10. For however many digits after the decimal point there are, we will multiply the numerator and denominator of -778.3957391046/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of -778.3957391046/1 each by 10000000000:
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 -778.3957391046 as a fraction:
-INF/INF / 1