Step 1:
The first step to converting 77458.76728932 to a fraction is to re-write 77458.76728932 in the form p/q where p and q are both positive integers. To start with, 77458.76728932 can be written as simply 77458.76728932/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 77458.76728932, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 77458.76728932/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 77458.76728932/1 each by 100000000:
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 77458.76728932 as a fraction:
309835/4 / 1