Step 1:
The first step to converting 518415.6402592 to a fraction is to re-write 518415.6402592 in the form p/q where p and q are both positive integers. To start with, 518415.6402592 can be written as simply 518415.6402592/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 518415.6402592, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 518415.6402592/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 518415.6402592/1 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 518415.6402592 as a fraction:
518416/1 / 1