Step 1:
The first step to converting 543421.8107654 to a fraction is to re-write 543421.8107654 in the form p/q where p and q are both positive integers. To start with, 543421.8107654 can be written as simply 543421.8107654/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 543421.8107654, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 543421.8107654/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 543421.8107654/1 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 543421.8107654 as a fraction:
543422/1 / 1