Step 1:
The first step to converting 421564.8144146 to a fraction is to re-write 421564.8144146 in the form p/q where p and q are both positive integers. To start with, 421564.8144146 can be written as simply 421564.8144146/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 421564.8144146, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 421564.8144146/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 421564.8144146/1 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 421564.8144146 as a fraction:
421565/1 / 1