Step 1:
The first step to converting 216455.3165423 to a fraction is to re-write 216455.3165423 in the form p/q where p and q are both positive integers. To start with, 216455.3165423 can be written as simply 216455.3165423/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 216455.3165423, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 216455.3165423/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 216455.3165423/1 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 216455.3165423 as a fraction:
649366/3 / 1