Step 1:
The first step to converting 420764.9616577 to a fraction is to re-write 420764.9616577 in the form p/q where p and q are both positive integers. To start with, 420764.9616577 can be written as simply 420764.9616577/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 420764.9616577, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 420764.9616577/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 420764.9616577/1 each by 10000000:
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 420764.9616577 as a fraction:
420765/1 / 1