Step 1:
The first step to converting 77485891.386878 to a fraction is to re-write 77485891.386878 in the form p/q where p and q are both positive integers. To start with, 77485891.386878 can be written as simply 77485891.386878/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 77485891.386878, which in this case is 6. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 77485891.386878/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 77485891.386878/1 each by 1000000:
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 77485891.386878 as a fraction:
77485891/1 / 1