Step 1:
The first step to converting 256410.36570972 to a fraction is to re-write 256410.36570972 in the form p/q where p and q are both positive integers. To start with, 256410.36570972 can be written as simply 256410.36570972/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 256410.36570972, which in this case is 8. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 256410.36570972/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 256410.36570972/1 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 256410.36570972 as a fraction:
512821/2 / 1